MangDav
10 mW
- Joined
- Mar 31, 2022
- Messages
- 27
So I been doing some research and can't find a concrete answer. I'm trying to find if there's a way to work out expected voltage sag of a cell/battery pack. Reason why I'm trying to find this is because I have a 20s14p Panasonic ncr18650ga battery which I use with a 150A Sabvoton controller, when I full throttle from a dead stop, I can see voltage drop as high as 8V-9V which I don't know if this is normal for 150A draw from a 72v pack, this is my first 72v build, I always messed with 48v systems and from experience, I know 3V-4V voltage sag is normal. The seller claimed that the battery pack's rated discharge is 150A with max continuous discharge current of 200A for 5 seconds so I am at the batteries discharge limit, atleast the BMS limit so could such a high draw cause such a drastic voltage sag? When I full throttle going 5MPH-10MPH I will only get 2V voltage drop which sounds normal to me.