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Technology Stocks : VALENCE TECHNOLOGY (VLNC) -- Ignore unavailable to you. Want to Upgrade?

To: Emmo who wrote (11654)	6/2/1999 12:16:00 AM
From: Chisy	Read Replies (2) \| Respond to of 27311

Unfortunately that has nothing to do with Valence. Right? Granted that would add respectability to Li Poly, but that's all.

To: Emmo who wrote (11654)	6/2/1999 9:47:00 AM
From: Ray	Respond to of 27311

EMMO: "The detail you may have overlooked is that Delphi is calling their LiPoly "life of vehicle" batteries. Lead Acid and NiMh are good for maybe 3 years in a "deep cycle" environment and very expensive to replace. The limited life of current batteries make them temporary fixtures in electric and hybrid vehicles. Not to mention problems with "memory", charge cycles and weight. LiPoly is solves a lot of problems for electric and hybrid designers." No, I did not overlook that detail. The fact is, however, that current NiMH technology involves excellent deep-cycle performance - about 1000 cycles. In GM's EV1, this would provide about 150,000 mile lifetime even if the batteries were always deeply discharged before recharging (a worst case scenario). SLI batteries are typically deeply discharged only occasionally, so NiMH SLI batteries definitely qualify as "life of car" capable. However, this claim, for any type of battery, must be tempered for EV's by the fact that EV's will probably be practically immortal. Another factor is that "worn out" NiMH batteries have reclaim value. You may be confusing NiCad performance with NiMH performance. NiMH batteries are noted for NOT having memory effects and FOR having long cycle life. My main point, though, is that the ruggedness, all-weather performance, long life, and reliability of the (ENER) NiMH batteries are well established -- specifically for EV and HEV use. Whatever the ultimate qualities LiPoly batteries show for these applications, the fact is that these are not yet proven. Auto manufacturers are understandably conservative about committing to new technology, so LiPoly batteries will need some time before they are truly accepted, IMO.