I have a strange problem on my ebike battery pack 60v 32ah 16s11p panadonic 18650 i forget my key and the headlight stay on for few day it completly drain the batrery like very dead now when i charge it my charger stop at 75% and only do 64v total instead 67.2v. I suspect i have some cell out of balance and bms not bring them coorectly and all my other cell are full...... Also when i discharge now on battery meter it will read like im 10% left and in fact i read 55v+ whit voltmeter it like my bms read the low battery and give me % anyway i need help to fix this battery pack it almost new and cost me 2000$
@@bandarnes thanks. I'm a bit confused though. A diy powerwall made buy a famous UA-cam was made out of recycled 18650. He mixed the weakest with the strongest to even out each module of the powerwall. Why?
@@wooferhound7571 What you claim is FALSE! A BMS that does a Top Balance of the cells, works just fine. Start with all cells at Top Balance, then use ( discharge ) the pack until the weakest cell hits the lowest allowed voltage, then recharge the pack and the BMS will Top Balance all cells again. All cells will return to the max upper voltage = NO DRIFT ! ... Repeat over and over and over ... Mixed capacity just wastes the capacity of the largest cells. All 18650 cells have different capacity.
the model files .slx are not accessible, can you please share them via link directly especially for SOC estimation
Perfectly what I was looking for. Thank you.
I have a strange problem on my ebike battery pack 60v 32ah 16s11p panadonic 18650 i forget my key and the headlight stay on for few day it completly drain the batrery like very dead now when i charge it my charger stop at 75% and only do 64v total instead 67.2v. I suspect i have some cell out of balance and bms not bring them coorectly and all my other cell are full...... Also when i discharge now on battery meter it will read like im 10% left and in fact i read 55v+ whit voltmeter it like my bms read the low battery and give me % anyway i need help to fix this battery pack it almost new and cost me 2000$
Should the weakest cells grouped together or mixed/coupled with three strongest to even the system out?
No.Always group cells of similar capacities
@@bandarnes thanks. I'm a bit confused though. A diy powerwall made buy a famous UA-cam was made out of recycled 18650. He mixed the weakest with the strongest to even out each module of the powerwall. Why?
Can i use 9 18650 batteries woth different amphere but using bms?
I would not recommend it. They will drift out of balance rather quickly if they are not closely matched.
@@wooferhound7571 What you claim is FALSE! A BMS that does a Top Balance of the cells, works just fine. Start with all cells at Top Balance, then use ( discharge ) the pack until the weakest cell hits the lowest allowed voltage, then recharge the pack and the BMS will Top Balance all cells again. All cells will return to the max upper voltage = NO DRIFT ! ... Repeat over and over and over ... Mixed capacity just wastes the capacity of the largest cells. All 18650 cells have different capacity.