Ebike "Boost Bottle"

Ussyamoto

10 W
Joined
Jun 27, 2014
Messages
96
Location
Dallas, Tx
I keep reading about people wanting an extra "boost" of speed it they need it. I'm part of this group and have an idea that I haven't seen others talk about.

I want to have the ability for extra speed when I want also, but can't afford the batteries. So, my idea is to have a little battery pack made up of cheap lipos for example 6s1P for an extra 24V 2200mAh.
Sorry for the paint, only program I have available right quick,

BoostSimple.png

Simple Idea, just an inline switch that would put the 48V pack in series with the 24v pack, and a multi-meter to make sure you don't over discharge the Lipos
Positive: Simple, Cheap, and easy to do.
Drawbacks: Bulky wiring and would need a switch rated for 3600w.. could be bulky.

Boost2.png

Another Idea, use a remote 5v source to trigger a solenoid.
Positive: Can keep everything bundled together and clean, can use smaller gauge wire for switch.
Drawbacks: A little more complicated.

Please give me feedback on this, I'd like to know if others think this is a good or bad idea and why.

The only drawbacks I can see for this setup is a momentary cut in power while it switches, probably wouldn't be too noticeable, and the need of a controller that could support 48v/72v.
 
Just get more battery, enough to run 72v all the time.

24v 10 ah is cheaper than that switch, or close to it. 3 speed switch on the controller, so you don't have to run full speed all the time. Of course, you will want to run full speed most of the time.
 
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