[ausev] Trike conversion: Circuit Question.

[Erik Bigelow]

Typically if you have room for more batteries in the high voltage
pack, go ahead and add them and use them all the time, instead of as a
boost battery. The reasoning is that if you have the space, and weight
capacity, the extra battery(ies) in the circuit helps all of the
batteries live easier and do less work, and ultimately live a long
happy life. That's the usual answer. If you're looking to do something
less conventional you may be able to add in some boost power, but
every switch and control you add is extra complexity.

Some older controllers would have a switch that would short the
controller out of the circuit in a fully floored condition so you
don't have the losses in the controller. Personally that idea scares
the beejeezus out of me.

The other thing to keep in mind is that if you add in a suddenly
higher voltage to your traction pack, the input capacitors on the
controller are going to pull a big current spike, which isn't an
intended mode of operation for the controller. I don't like to
"surprise" my controller =)

Erik

On 11/7/06, jtp <jtp at onr.com> wrote:
> In the circuit design of this Electric Motorcycle,
>  Would it be feasible to have a "Passing Battery"
> linked into two DPDT (if they exist) contactors in order to provide more
> voltage temporarily if one needed to accelerate and merge into traffic more
> safely utilizing another battery such as the momentary use of the Auxiliary
> 12 volt battery, while isolating the contactors, etc,  with a small sealed
> gel, or small array of LI-ION nano-phosphates, for the 10 second boost
> stage?
> Would the controller  be able to take a surge and pulse as well?
> Dan.
>
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