(11th posting try, already: �The web site you have requested may be experiencing technical difficulties due to a busy or broken server�. Yahoo! is seriously broken, folks, and we may not see it fixed for a long time.)
I would like to hear your take on Andy Franks comments.
As you say these are incredibly complex tradeoffs and analysis.
Thanks in advance!<<
I�m happy to see him comment, though I find what he said somewhat mystifying � particularly since there have been at least two independent auto-industry comments that apparently disagree (fully satisfactory Lithium-based propulsion batteries were expected to be at least 5 to 10 years away.)
I�ve already posted some obvious discrepancies in the Lithium-based battery claims, and these have not really been addressed in the subject Calcars thread. So, I immediately decided to work up a reply and ask for his input re some serious discrepancies in claims re Lithium-based rechargeables vs NiMH � mainly the ones I�ve already posted here. I think his entry into the discussions reasonably guarantees further input from him, which will no doubt be of interest to us.
It will take a while to retrieve the necessary quotes and data and to write a cogent response. And, even more time trying to get anything posted here.
Closer reading of Dr. Frank�s �Calcars� comments suggests he is just trying to be supportive. It sounds like a kindly professor cautioning an amateur effort and giving as much praise as can be honestly muster.
>>This is a good summary of the state of the practical battery options as they exist today. I'm glad that you have done this work, but as I said in the beginning that the path to batteries is not easy unless a battery manufacturer is behind you. D cells are not too practical!!
Thus the conclusion I have come to is that the Valence battery is the most cost effective and practical at this time.
What do you think??<<
I think he is just recommending the Valence battery as a default choice � since no other company is willing to support what is evidently a very small and rather naive effort (with possibly some liabilities in the offing). I�m not deprecating small efforts, however � just noting that this is one and I see some lack of professional savvy. And, even automakers are cautious about taking on battery-system engineering � as evidenced by Cobasys being asked to develop whole systems, not just the packs.
Whatever, Frank�s comments provide an entry for getting more information from him, and I intend to make use of the opportunity. I tried to visit both he and Dr. Burke about 3 years ago, when I was in Davis, CA; but only Dr. Burke was available. So, I�m happy to have another opportunity to ply him with some questions.