Powered by 30 6v nominal Nickle-Iron (NiFe)
Edison batteries mirroring the original
TEVan traction pack.
We have heard (c2005) much talk about the potential development
of range extending trailer applications in theory, but have
not found anyone verifying the concept
by building a prototype.
Since we had an entire extra set of EP NiFe 200 AH batteries
we decided to give the RXT-B (range extending trailer - battery) a real
life test. Of course, one should always start with the theoretical, so
here is a bit of data to share.
The TEVan has a single-string 180v pack that consists of 30
200AH modules and weighs 1,650 lbs. The vehicle has a
total OEM weight of 5,000lbs and a published 80 mile range. By
adding a RXT-B as a second, parallel string, we increase
the overall vehicle weight by 1,650lbs.
The question is what additional range would we be expected
to achieve with the second string?
The math equation would be as follows: “from the relation
range [km] = capacity [kwh] x 250 / mass [kg] ^ 0.6I”.
Therefore, doubling the energy capacity while
increasing weight by 33% gives a range increase of X 1.68 or a
135 mile range. 135 miles on a TEVan would be
impressive. So we are off to try the experiment.
The following photographs represent the project status
from inception to present, c2005, and although it is not
yet completed, it is getting close.
---> Additional pictures below <---