Booster Pack

[broloch]

I read this a few times here and now. Who of you are running a booster pack with your set-up?

What is your standard battery and how much extra do you run your booster?

Is it safe to run a booster with a lower Ah than your standard pack, provided that you keep an eye out on how much you are discharging (to ensure you are not overdischarging)?

 

[D-Man]

I run a 9ah battery with my 12 ah batteries. The 12 ah are old and the 9ah is new and they have the same capacity (sla). I sometimes run a 12v booster but really its around 8v once 2 cells die in about a mile. Just monitor voltages at first and see how they react.

 

[Link]

I plan on running a 24V booster in the near future that should get me up to over 40mph.

Is it safe to run a booster with a lower Ah than your standard pack, provided that you keep an eye out on how much you are discharging (to ensure you are not overdischarging)?

Sure, but you'd better hope you don't forget or miscalculate how much you've used. I plan to use a relay, so I can work out a rudimentary LVC and tie that into its coil to keep me from running it dead.

 

[swbluto]

I like the idea of the booster pack and I'm contemplating it. But then I'm not seriously...

The idea of capably going 35 mph and conquer those slight hills at 25 mph kind of excites me, but I can imagine I'd "abuse" it. I seem to get enough attention by fellow cyclists when I pass them up at 30 mph pedaling(especially the "lycra" folk), and they're usually going 15-22 mph; I don't think I want to find out what attention I'd get from police at 35. I already "speed" in neighborhood sections. :lol:

I also noticed how my 36V usage of 15 wh/mi. slowly evolved to 25 wh/mi when I upgraded to 48V(I'm a bit more conservative on "long" trips though. Something like 20 wh/mi). I think I'm becoming accustomed to the power.

 

[Link]

I also noticed how my 36V usage of 15 wh/mi. slowly evolved to 25 wh/mi when I upgraded to 48V(I'm a bit more conservative on "long" trips though. Something like 20 wh/mi). I think I'm becoming accustomed to the power.

LOL, mine's never gone below 26Wh/mi and I have NO hills whatsoever. :lol:

 

[avsmith66]

I'm curious as to how you would wire your booster pack. So far the only feasible idea I have come up with is using a push button on the handlebar and a relay switch to engage the battery pack.

 

[Link]

I'm curious as to how you would wire your booster pack. So far the only feasible idea I have come up with is using a push button on the handlebar and a relay switch to engage the battery pack.

Pretty much, yeah. That's how it works.

 

[nitecheck]

I'm interested in adding a booster pack -11.1v to the 36v main pack...I was going to wire it up like Mark-A-W's pack - but thought maybe LVC module -like the ones used on electric model planes might be a good idea to prevent the booster pack from being drained to low....has anyone added one of these modules to protect a booster pack?

 

[nicobie]

I'd sure like to see a circuit diagram with the parts spec out. Aren't there diodes involved too?

If possible I'd like to add one of my extra SLA batteries to one of Pings 48v packs for 'temporary' :wink: :wink: use.

Nick

 

[Doctorbass]

I am familiar wityh booster pack.

now my project or "lab test" would be to build an "Active Voltage Sag Compensator"

When i put my throttle to 100%, my fully charged pack sag from 100.8V to 94V at 7600W and stabilise to 97V at full 46mph speed.. but i dont like loosing 4 volts.. it's 3mph lost!

so i would build a circuit that activate a relay to serie the 7V booster pack to the system, but that desactivate it if voltage would reach more than 101V...

maybe thay could ameliorate my 0-100m score to the low 7sec! 8)

Doc