Hey everyone, so I’m a newby in the DIY e-board space. I’ve pressed my own decks in the past, but this is my first electric conversion! I’ve been doing some research/planning and had some questions for you all regarding the design of some electrical subsystems.
Battery pack: I’m planning to make my own 12s10p pack using 21700-40T cells. I’m doing this partially to challenge myself to build a heftier slightly more unique pack than most DIY builds do using 18650’s, and partially cause it seems like it’ll be pretty bad ass (torque and range wise). My questions is, am I out of my league building this thing as a first timer?
BMS & ESC: from everything I’ve read the best way to configure a BMS into your build is to only use it for telemetry (cell voltage, temperature) of the pack, and for controlled charging and balancing. It seems like the consensus is to use your ESC to govern discharging. Assuming what I’ve said is all correct, how does the ESC/BMS do this? WIth a 12s10p pack driving four motors with connected ESC’s there would be a total max continuous current of 350A / 4 motors resulting in ~87.5A max CC per ESC (if my math is good). Is there an intake current rating for ESC’s?
What are the primary characteristics that drive ESC and BMS selection. From what I’ve seen ESC spec’ing is primarily a function of output current (i.e. to the motor), and BMS spec’ing is primarily a function of charging current. Does this mean the intake current for both from the battery does not matter?
Do you all have any recommendations for BMS’s and sensored ESC’s (VESC’s specifically) capable of handling the high current output from 12s10p pack?
Thanks in advance! Peace