Thursday, March 22, 2018

Re: [Electric Boats] 48V Lithium Ion EV Batteries

 

Hey John, I am almost done with my electric tug.  I too have been where you are.  And Yes, there is a lot of talk about how great the "cosmic" batteries are, especially the Tesla.  And I am with you in that they are so freaking expensive, they class themselves out of the common market.  I haven't read the article you site, but it has been my experience that from announcement to market is 3-5+ years.  So for those of us that are not independently wealthy, we are left with the various lead/acid and AGM/gell types. 

I would like to mention my great appreciation to Electroprops for directing me to a very good value that is made just 65 miles Northeast of me, in Springfield, Missouri.  It is the Northstar SMS-AGM480. >>  https://www.northstarbattery.com/  << 

This battery boasts a 217 amphour rating, is AGM, is 68.9 kg (151.5 Lbs.)  In my case, it is the most compact and has the best density of any of its competitors I have found.  I am sure there may be other vendors offering similar, but this one works for me.  The MSRP on their site is a bit high, but if you are on the West coat somewhere, contact Electroprops for pricing.

That is my 2-cents worth.  It is worth just what you paid for it. 

Cheers Mate,
Dan

----- Original Message -----
From: jmedclay@yahoo.com [electricboats] <electricboats@yahoogroups.com>
To: electricboats@yahoogroups.com
Sent: Thu, 22 Mar 2018 08:51:46 -0400 (EDT)
Subject: [Electric Boats] 48V Lithium Ion EV Batteries





 

I've been looking into the use of lithium ion hybrid car batteries as a replacement for lead acid EV batteries. I keep seeing references to 48V "Mild Hybrid Electric Vehicle" technology, like this: http://www.hybridcars.com/bosch-announces-new-48-volt-battery-pack/


I also keep seeing cost predictions/targets of Li-Ion EV batteries, at least in this 48V MHEV format, dropping to essentially the same as lead acid units, on a useful energy availability basis. Apparently they won't need fans and will be in conveniently sized modules.


But I don't yet see any of these 48V MHEV batteries for sale. What I see are astronomically expensive batteries in more familiar formats.


My very cursory look into Li-Ion batteries suggests a mass based energy density of
about 3x that of lead acid. Reducing
my 520# battery bank to 175# is very attractive.


Are any of you familiar with this, or similar, technology? I'm a couple of weeks away from replacing my 8, 6v EV batteries; if the Li-Ion stuff was available at/near the target costs I'd jump, no other technical problems assumed. I have a feeling I'm a few years early.


John Clay





--
Dan Hennis
CTR Services
P.O. Box 254
14237 FR 1155
Cassville, MO  65625-0254
417-396-0228

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Posted by: DAN HENNIS <dhennis@centurytel.net>
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