Time to put the bike away..1 question..

[migueralliart]

I am with you guys. I've never used a BMS and I don't think I ever will because;
1- I monitor my packs on a cell level using the 5$ lipo alarms @ 3,6v
2- I have a controller LVC too set for 3.65*cells in series.

It is extremely difficult for me to be out of balance since I originally balanced all my packs with my icharger which was calibrated using a voltage reference which was calibrated with a really high precision.

 

[Mudduck]

Thank everyone for your input,but I really don't want to cut into my shrink wrap on my battery..the bike isn't going to sit for 4-5 months..I will use it on a nice winter day ride just not back and forth to work..I'll charge it about half way and bring it in the house nice and warm..if that's good..

 

[gua_rana]

My Cellman 16S 5P 26650 A123 pack has been sitting since 11th of November. It is still at 52.7 V where I left it. I haven't measured any single cell group voltages, because I don't want to rip open that masterpiece.

 

[Architectonic]

My Cellman 16S 5P 26650 A123 pack has been sitting since 11th of November. It is still at 52.7 V where I left it. I haven't measured any single cell group voltages, because I don't want to rip open that masterpiece.

The only disappointing part about this is the fact that you haven't been riding.

 

[docnjoj]

Thank everyone for your input,but I really don't want to cut into my shrink wrap on my battery..the bike isn't going to sit for 4-5 months..I will use it on a nice winter day ride just not back and forth to work..I'll charge it about half way and bring it in the house nice and warm..if that's good..

I use both systems and never store my bikes. We ride almost daily and while Fairhope is not paradise (at least in the summer) it is ridable all year round. I have had BMS drain a few cells when I used to store my Pings and would use dnmun's switch if I had to store batteries but in normal use thaey just keep on ticking. My A123's don't use a BMS but an LVC switch and are charged with a Hyperion and balanced each time, usually 5 time per week. I think our situation these days is that you have to use both a human monitor and BMS or charger to keep them in good shape. My wife's Ping is over 5 years old and has about 15000 miles on it. It is paralleled with Fatpacks and only draws about 5-6 ah in 20 miles in the parallel format. They are charged with separate chargers and the Fatpacks have no BMS at all..
otherDoc