BBSHD and a 15s battery

[zippy500]

Looking at my battery build for a BBSHD. I am looking at a 52v battery 14s4p

Is or has anyone tried a 15s setup, I was thinking a 15s setup and charge the pack to 60v max which will mean each cell will charged to 4v.

I am lead to belive that the controller will take a max of 63v.

Are there any disadvantages to doing this, it will only mean four extra cells in the pack.

Any recommendations for a BMS for a BBSHD.

 

[Mündawg]

A nominal 60v battery only charged to 60v is kinda like only using 50% of what you could use. I'd go with the 52v BBSHD and infact i plan on doing so soon.
Just my 2 cents

 

[Mündawg]

i also heard that the bbshd only handles 60v. i forgot to add that

 

[Ykick]

My 52V BBS02 shuts off above 60V. I think there's a HVC setting in programming.

 

[Raged]

Because the capacitors are rated at max 63v. if the default controller didnt shut it off, you'd be in for a new controller. If you want to run more voltage, get an external controller.

 

[999zip999]

Buy a different mid drive.

 

[LiFeCycle]

14s hot off the charger is 58.8v. That's already a wafer thin margin of safety. There is no advantage to exceeding that, and many disadvantages - either you'll exceed the HVC and not be able to ride at all, or you won't be able to fully charge your batteries. Also, your battery will be an odd voltage, and incompatible with other 48v controllers.

You've only got 4p there. I'd suggest you'll get much more of a benefit by adding more parallel groups, i.e. getting a higher capacity battery, than by going over 14s. I noticed a significant improvement on my BBS02 by switching from a 500wh to a 1.2kwh pack. Lots less sag, less of a feeling of the bike being worn out or sluggish at the end of a ride.

 

[zippy500]

Ok Thanks think I will just stick to 14s.

The reason I went for 4p is the fact I went for GA cells over PF which works out at 14ah which I hope will cover my 20mile return
the battery cost worked out the same for the GA over the PF. I suppose I can add anther row cells if I dont get the distance needed.

I really need to look for a BMS now can anyone recommend a reliable one is a 30a ok for a BBSHD.

 

[Ykick]

14S BMS you might find something helpful here:

https://endless-sphere.com/forums/viewtopic.php?f=14&t=84798