An in-depth discussion of batteries and such

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reikiman
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An in-depth discussion of batteries and such

This is a really really in-depth, long, interesting article about batteries, especially lithium based batteries, from someone who has been doing EV conversions since 1981.

http://groups.yahoo.com/group/electric_vehicles_for_sale/message/12013

Mik
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Re: An in-depth discussion of batteries and such

They are still at it, a rather heated debate. Quite interesting!

This information may be used entirely at your own risk.

There is always a way if there is no other way!

reikiman
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Re: An in-depth discussion of batteries and such

Yeah, truly interesting. Doug Korthoff has been dominating that group and another, Doug has a long history in EV activism and was one of the people showcased in Who Killed the Electric Car. Doug has been ranting in that group about how NiMH batteries are superior to everything else, how the oil company ownership over Energy Conversion Devices and Cobasys have tied up the large format NiMH to prevent their use in cars, and how Lithium based batteries are inferior to NiMH ..etc..

If lithium batteries are inferior then why are most of us focusing on finding and getting LiFEPO4 batteries?

Anyway the other guy is making very interesting claims based on having built a car using thundersky LiFePO4 cells and driven it for over 5000 miles. The story didn't go over well with these guys focused on the NiMH story.

Iccarus
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Re: An in-depth discussion of batteries and such

Thanks that was very interesting, both sides made some good points. Sure maybe lithium isn't as cost effective (right now),but most of us are trying for performance and range. I hate to say it but if cost is the deciding factor I think we would be back to gas sippers. UGG!

2008 XM3500li Mods/Kelly KBL12251/84v 28cell 40AH pack/ Variable regen brake trigger on left brake handle/Givi/Cycle Analyst/Homemade BMS

KMX Typhoon Home build (recumbent pedelec) with two Astro Brushless 3220motors/twin castle Phoenix ICEHV 160/ Cycl

JavierCentenera
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Re: An in-depth discussion of batteries and such

Firstly, thanks, David for the opened threshold...

That link shows, perfectly, the reasons why the BEV is not yet avalaible for everyone. The Ownership of batts is a "Must" and only Special People Know how to drive (themshelves) for the lasting of Batts.

Whould You(All) rule to (try) get the success?

i.e.
1 NEVERSQUEEZE=EVERLAST

Best for it!!!

antiscab
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Re: An in-depth discussion of batteries and such

Anyway the other guy is making very interesting claims based on having built a car using thundersky LiFePO4 cells and driven it for over 5000 miles. The story didn't go over well with these guys focused on the NiMH story.

yeh thats jack rickard. hes a regular on the thundersky forums. hes around 50 cycles into his pack (has 100 mile range)
my pack is at 1100 cycles to 60%.
theres lots more examples among the lithium camp (most arent all that vocal).

lotsa reasons why LiFePO4 is better than Ni-MH (even the crap that thundersky sells)
up front price, energy density, etc preaching to the converted here i spose though

Matt

Daily Ride:
2007 Vectrix, modified with 42 x Thundersky 60Ah in July 2010. Done 194'000km

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