helpfulguy
10 W
Hello,
I previously did this for my 400cc single cylinder motorcycle and it worked great:
I just dropped it in, and it worked great, cranked it like nothing. I now need for my small 70cc.
Problem:
It is not uncommon for old scooters to have "leak" short circuits that drain the battery slowly. Instrument panel cables deteriorate etc. I would prefer if possible to have low voltage cut-off, to protect battery in that case. But not required.
I got this BMS: https://www.banggood.com/4S-100A-12V-LiFePo4-18650-Battery-Cell-BMS-Protection-Board-Balance-With-Cable-p-1217848.html?rmmds=search&cur_warehouse=CN
But it requires separate lead for charge and for drain. My scooter only has positive and negative, so I don't think I can use the BMS.
Suggestions?
Question 2:
Have been out of the loop for a while - have anything happened that can accomplish better, than A123 26650? I would consider factory built packs but they seem to be $150+ compared to $60 for DYI.
I previously did this for my 400cc single cylinder motorcycle and it worked great:
4s A123 26650
No BMS
I just dropped it in, and it worked great, cranked it like nothing. I now need for my small 70cc.
Problem:
It is not uncommon for old scooters to have "leak" short circuits that drain the battery slowly. Instrument panel cables deteriorate etc. I would prefer if possible to have low voltage cut-off, to protect battery in that case. But not required.
I got this BMS: https://www.banggood.com/4S-100A-12V-LiFePo4-18650-Battery-Cell-BMS-Protection-Board-Balance-With-Cable-p-1217848.html?rmmds=search&cur_warehouse=CN
But it requires separate lead for charge and for drain. My scooter only has positive and negative, so I don't think I can use the BMS.
Suggestions?
Question 2:
Have been out of the loop for a while - have anything happened that can accomplish better, than A123 26650? I would consider factory built packs but they seem to be $150+ compared to $60 for DYI.