Moved out of an unrelated help wanted thread to it's own thread in items wanted since it is for a specific item different from that thread. Feel free to edit the title of your thread to better match content.
If you prefer this thread can be moved to Battery Technology where more battery people are likely to see it; let me know.
Note that the "CCA" spec of the pack you link and describe implies that it is only capable of doing that for a few seconds, as that's all that's required for starting a car/etc., which is what that battery is designed to do. It's unlikely to be able to sustain that beyond that time, without overheating or damaging the cells, possibly interconnects, protection electronics, etc.
Additionally, the specs in different places on the page don't match each other, which may mean that none of them are correct, or that the item you receive may be different than that being advertised, so may not do what you want after you get it.
Generally, any LiFePO4 is less likely to be good power to weight ratio vs other lighter types of cells (NMC, LiCo, etc); they're just heavy cells. Is there a specific requirement for it to be LFP?
Or is there any chemistry you *don't* want?
Or any specific cell type you do or don't want?
Any other restrictions on the pack size, shape, weight, etc?
It's likely that pouch cells in a properly designed and built compression housing would have the highest density of cells (less wasted space), depending on the specific cells used.
It's likely that a custom battery pack (rather than combining or using existing OTS packs) would get you better results.
For these specifics
I need a battery for a drone with a 400lb payload, using 6 EDF's with the following requirements.
- Max. Input power: 23kW
- Permitted battery: 12S - 28S 10,000 + mAh
- Permitted Controller (ESC): 200A - 300A
you'll need to make some decisions before you can specify a battery.
What actual system nominal voltage do you want to use? This determines your max motor speed, based on the kV of the motors. Since you are driving propellers, which have a max RPM, you'll need to work backwards from the RPM to the kV to the voltage of the battery, to make sure you are able to drive them as fast as you want with the battery you choose. Be sure to specify a voltage that works even when pack is just above empty, but that is not too high for your controllers/etc when full.
The battery must supply all the current of the system, including any startup spike currents, without stressing the cells, interconnects, wiring, fuses, connectors, or support electronics (BMS, etc). You'll need to specify the absolute max peak and continuous currents you need the battery to handle, to be certain that the final result can do so. I recommend adding a percentage, 10-25% or more, to your numbers to account for pack aging over time and the cell damage / wear from hard usage so it will still perform at minimum requirements even at end of pack life.
Capacity of the battery will depend on the range / flight time you require vs the Wh usage of the system under your flight conditions. I recommend adding at least 25-50% to your minimum requirement to account for pack aging over time and hard usage, and another 25-50% to account for unforseen flight conditions and "go around" events (any event that requires more range than you planned for).
monsterscooterparts.com
