garolittle
10 kW
I have been asking several sources for their opinions on this question. For an electric go kart project, my plan is to use the following:
The main objective is speed so driving range is secondary. With that in mind, would you recommend that I make the parallel and series connections using a spot welder and the .15mm x .70mm pure nickel strips or should I individually fuse the cells? To avoid excessive heat, I have been practicing using a spot welder to connect thin fuse wire (which blows at about 5 amps) to the cells instead of soldering. I would think that spot welding the fuses improves safety (since thermal runaway would be less likely) but I also want to avoid adding too much resistance into the circuit. Any opinions or suggestions would be greatly appreciated.
Gary
- Brand new Samsung INR18650-25R cells (20Amps maximum continuous discharge)
Battery packs: Using the Samsung cells, I plan to have two separate 20S5P packs connected in parallel
Motor: 72V Motenergy Brushless Motor (ME0201014201). Continuous current - approximately 50 - 60 amps at 72V
Charge Controller: Sabvoton (svmc72150) DC Current Limit: 100A
The main objective is speed so driving range is secondary. With that in mind, would you recommend that I make the parallel and series connections using a spot welder and the .15mm x .70mm pure nickel strips or should I individually fuse the cells? To avoid excessive heat, I have been practicing using a spot welder to connect thin fuse wire (which blows at about 5 amps) to the cells instead of soldering. I would think that spot welding the fuses improves safety (since thermal runaway would be less likely) but I also want to avoid adding too much resistance into the circuit. Any opinions or suggestions would be greatly appreciated.
Gary