shr00m
10 W
- Joined
- May 18, 2016
- Messages
- 75
Recently purchased a 1000 watt rear hub kit on ebay. I plan to build a battery pack from 18650s i have about 140 good cells about 70 percent of them are new cells but all mixed and all pulled and detabbed from laptop batteries. I purchased a 13s 30amp bms i was planning on doing groups of 10 since i have so many batteries one thing im really confused about and ive tried to find the answer myself in videos and forums posts but i cannot seem to find this out. When using a BMS what are the 2 wires coming out of the bms for the P- C- and B-.... I realize what the 14 other wires are 4... and i had assumed the p- c- and b- became the + and - of the whole 48v battery once they are linked but then looking at the wires coming out of the BMS the 14 wires... they seem too small to carry such current to power the motor... am i missing something here? is the battery supposed to be hooked up separately to the controller and not through the bms? any tips on soldering together a large pack such as this would be appreciated too. i plan to carry it on the rear rack but would love it mounted in the triangle just dont know if i can handle that for first build. thank you