[Oeva-list] MIT research: Lithium Iron Phosphate batteries

[Gary Graunke]

Overnight charging at 120V works for me in practice--I used that for a 
while. I only need 240V on weekends (mostly) when I've been driving a 
lot during the day and need to drive in the evening.

Most of the fast charging I do is on the road. If I don't have charging 
at my destination, I need to charge up a bit before returning home.

So I need the level 3 or dump packs or an ability to change packs 
somewhere on the road. Perhaps the equivalent of a gas station.

We don't know what the level 3 charging connector would look like, but I 
have some 350A anderson connectors that would work just fine for a long 
time. I would even upgrade the wiring from the 4GA to 2/0, anderson 
connector from 175 to 350, and fuses from 50A to 300A. Bring it on!!!

Gary


Myles Twete wrote:
> Gary-
>
>  
>
> You need a home dump pack then.obviates the need to suck multi-KW power from
> your grid.
>
>  
>
> -Myles
>
>  
>
> From: oeva-list-bounces at oeva.org [mailto:oeva-list-bounces at oeva.org] On
> Behalf Of Graunke, Gary
> Sent: Monday, March 16, 2009 2:04 PM
> To: Philip Kollas; oeva-list at oeva.org
> Subject: Re: [Oeva-list] MIT research: Lithium Iron Phosphate batteries
>
>  
>
> My A123 cells *already* can charge in 15 minutes, per manufacturers
> recommendations for fast charge (the slow charge is 45 minutes). 
>
>  
>
> The only issue is getting a 40KW charger to charge them. This has the same
> service as my entire house (200A). 
>
> And if I put in 4 more batteries (adding to the 6 I have already) to get to
> 100 mile range, I would need more like 56KW. 
>
>  
>
> So the batteries already can handle level 3 charging, but the level 3 is a
> bit further down the road.
>
>  
>
> Gary
>
>  
>
>   _____  
>
> From: oeva-list-bounces at oeva.org [mailto:oeva-list-bounces at oeva.org] On
> Behalf Of Philip Kollas
> Sent: Monday, March 16, 2009 1:06 PM
> To: oeva-list at oeva.org
> Subject: [Oeva-list] MIT research: Lithium Iron Phosphate batteries
>
>  
>
> Did anyone else hear the NPR Science Friday broadcast on 3-13-09, in which
> an MIT professor of materials & engineering talked about their discovery?
> He said they had found that tweaking lithium with iron phosphate (iron
> phosphate being the same material that battery giant BYD is now going with
> for their rechargeable cars) made for a much-quicker recharge time as well
> as greater acceleration.  The recharge time went from hours down to about a
> minute.
>
> If this is true and the new material can be incorporated into an affordable
> technology for EV batteries, it seems we would have overcome one of the
> common objections to EVs (lengthy recharge time).
>
> Thanks, Philip Kollas 
>
>
>   
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>
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