You guys had some good sugestions, here's a revised side view.
--I shortened the head tube and lowered the top tube, it improves the structure and looks better
--You don't see it in the side view, but the carrying rack is narrower for better use of paniers
--I decided to use the same battery as for my recumbent, it's a different shape so it loads from the side instead of the back
--I lengthed the wheelbase 1" in the back to make just enough space for the battery
The changes in the back have had a bad affect on frame strength. The original version had a straight line load path from the axle to intersect of seat and top tubes. Now the battery is right where there ought te be a strucural member. At some point I may add an additional strengthening tube.
Anyway, I will be starting on the frame today.