docnjoj wrote:Definitely more power on hill at 36/10 //! 72 volts series is outa my league! Thats real speed! But speed costs money! Controller plus better brakes plus.......
Heh - better put a shopping list together - In all seriousness - what am I looking at?
Disk brakes a necessity do you think?
Another battery ain't gonna be cheap
controller - infineon?
Will my existing motor handle it or do I need a bigger 'un?
- I'm sure there's a thread on this somewhere ... hint
im in a situation like you at the moment, im building a 60v from the standard 36/10 one. Adding an extra 24v, what i bought was:
1) a ping battery, but you might just want to upgrade to 48v, if you dont want to spend too much, but i got a 24v instead
2) then you need to get a controller, i prefer ecrazyman's one which is the cheapest one i found. He does LVC for you at your request.
3) buy some connectors and might need to solder some wires together that will fit with the new controller.
4) get a rack or some sort of battery mount if your upgrading from a stock ebike.
5) If you have battery level LEDs on your throttle and if you want to overvolt your bike, then you might need to unplug the wire that goes to those lights to prevent it from getting blown out. If it doesnt get blown out then it just be really bright and will not sure an accurate indicator of your battery level. Most throttles are 24v or 36v versions for standard stock ebikes, and the indicators takes like 5v normally, so if you overvolting then it might blow up.
6) When rigging 2 BMS batteries, then you may need a diode in between as indicated by Fletcher, but im still stuck on this stage right now so dont take my word for it. http://endless-sphere.com/forums/viewtopic.php?f=16&t=1312
Scroll down to the last diagramhttp://www.endless-sphere.com/forums/viewtopic.php?f=2&t=6274
He discusses it here.
7) you definately need disc brakes, even my stock 36/10 setup gave me trouble to stop when i was only using the standard rear U-brake. Disc brake has a lot more stopping power
im pretty sure your bafang motor can handle higher voltage than 36v, bafang motors are not that easy to fry.
Project 1: 48v 500w Golden motor upgrade on Express Green E wheels upgraded to 48v 10ah Ping battery Flat speed: 44km/hr Pedal assist: 49.9km/hr Uphill speed: 40km/hr
Project 2: A female Kmart mountain bike 26" wheels mounted with a 500w cyclone with a 24v 20ah 13C Lifepo4. Flat speed 30km/hr pedal: 35km/h