Hi guys
I have a 36v 10ah lion pack driving small brushless geared hub, not sure of the brand.
looking for a little more top end speed and torque for hills.
Existing controller is marked as 36v 16A max, Have looked at upgrading to a 20+ Amp model 36 to 48v, my questions have to do with the Batteries!
After reading through the posts here I am more confused than ever about which batteries to use, as I understand it (correct me if I am Wrong)
the "c" rating of most ebike batteries lion chemistry is probably no more than 2 which means my 10ah pack can deliver max 20a current for short periods?
I only have a short ride to work of 5kms, so do I only need a smallish pack?? maybe a 36 or 48v 4ah?? but doesn't that mean I can't have more than 8amps for hills and acceleration??, so does that mean I still need to carry a 10ah+ pack for such a short journey??
OK I think I have worked out I need 48v for more speed and torque, can I just add a couple of small 11.1v lipo RC car batteries say around 4000mah wired in pararell of course to give an 8ah unit at 11.1v added in series to my exist 36v lion battery?
The thing about these rc cells apart from their safety problems is that they have a high "c" rating of 10+ and weigh not much!
So has anybody here done this, and what if any precautions have you taken, eg low voltage monitoring for the lipo cells?
Also what about using RC batts for the total supply eg 4 units for 44.4v at 4ah but can draw at say 5c = 20amps, if that works then it will not only be light but cheap (and possibly dangerous, maybe you go faster with a fire up your behind
)
any advice is greatly appreciated
thank you all
I have a 36v 10ah lion pack driving small brushless geared hub, not sure of the brand.
looking for a little more top end speed and torque for hills.
Existing controller is marked as 36v 16A max, Have looked at upgrading to a 20+ Amp model 36 to 48v, my questions have to do with the Batteries!
After reading through the posts here I am more confused than ever about which batteries to use, as I understand it (correct me if I am Wrong)
the "c" rating of most ebike batteries lion chemistry is probably no more than 2 which means my 10ah pack can deliver max 20a current for short periods?
I only have a short ride to work of 5kms, so do I only need a smallish pack?? maybe a 36 or 48v 4ah?? but doesn't that mean I can't have more than 8amps for hills and acceleration??, so does that mean I still need to carry a 10ah+ pack for such a short journey??
OK I think I have worked out I need 48v for more speed and torque, can I just add a couple of small 11.1v lipo RC car batteries say around 4000mah wired in pararell of course to give an 8ah unit at 11.1v added in series to my exist 36v lion battery?
The thing about these rc cells apart from their safety problems is that they have a high "c" rating of 10+ and weigh not much!
So has anybody here done this, and what if any precautions have you taken, eg low voltage monitoring for the lipo cells?
Also what about using RC batts for the total supply eg 4 units for 44.4v at 4ah but can draw at say 5c = 20amps, if that works then it will not only be light but cheap (and possibly dangerous, maybe you go faster with a fire up your behind
)any advice is greatly appreciated
thank you all
