Battery vendors (was: Liquid NiMH battery pack cooling?)
- Thanks, Jerry
Yes, we're in touch with Ben and with others at Cobasys (Ben Ovshinsky has
been very supportive of PHEVs, and recently contributed a "history of
PHEVs" to the CalCars website at http://www.calcars.org/history.html ), and
we do expect to explore sourcing from Cobasys as one of the most attractive
While general discussions of vendors and evaluations of quality of products
are highly appropriate topics for postings, given the complexities of the
battery supply industry, I would suggest that contact names and
granular-level discussions about different companies' products, especially
pricing and availability, be sent privately to Ron and/or to me, rather
than posted to the list. We also very much welcome comments either publicly
or privately about Ron's battety spreadsheet, which makes clear which
batteries are most favorably under consideration.
At 11:52 PM 1/3/2005, Jerry Pohorsky wrote:
>I think most of what you proposed is very reasonable. If it is possible
>to get modules from Cobasys, I would go that route since you would have
>much fewer interconnections to worry about.
>By the way, do you know what type of coolant do they use for their liquid
>At my company we do cooling with oil on one of our systems and ethylene
>glycol on another one. I think oil is messier to work with.
>I would avoid having the coolant come in contact with the Anderson
>connectors, if possible. On the othere hand, I do have a layer of grease
>on the Anderson connectors in my EV and they seem to have enough contact
>pressure to displace the grease for a decent metal to metal connection.
>Charge balancing is a good thing, to and would be easier to manage on a
>Cobasys module basis rather than having to deal with hundreds of D
>cells. By the way, have you talked with anyone at Cobasys?
>I have spoken with Ben Ovshinsky, (son of the inventor of NiMH technology)
>who was involved with the ECD marketing back in the days before Texaco
>Chevron. I still have his card somewhere. I think he used to also teach
>classes at UC Berkeley, so he may still be in the area.