Sunday, November 1, 2009

Re: [Electric Boats] Re: New "battery" Tech

 

Myles:
 
Could not agree more. I am very leary of a lot of the green snake oil being touted. Even more so now since the government is throwing a lot of money around hoping that some of it sticks. When I converted my boat to electric propulsion I kept in mind my needs as a cruising sailor and how I would maintain it when far away from homeport. I was particualarily concerned about the batteries. I went with AGM's because of their low maintenace, discharge and charge abilities and the ability to replace them easily at a local level and that they had been proven over a couple of years. That is not to say that I would not be open to new battery technologies in the future. Indeed that is one of the features that makes electric propulsion so attractive. Perhaps for some with deep pockets more complex EP systems and battery technologies may be the way to go. For me having invested the money in AGM's and the battery charges for them I am in no hurry to change them out until I see something with a good track record of at least five years.
 
Mike

 

From: Myles Twete <matwete@comcast.net>
To: electricboats@yahoogroups.com
Sent: Sat, October 31, 2009 11:14:33 PM
Subject: RE: [Electric Boats] Re: New "battery" Tech

 

Please folks, let's not waste bandwidth here talking about etherware or technology that is "promising", or  "just around the corner", but meanwhile extremely expensive and generally unavailable to our interest group.  These things may come to market in our time, or not, but as moderator, I have to call a stop to ask that you not post new, unmarketed technology announcements to this list or responding to these posts.  Doing so risks putting unmoderated posting privileges at risk.  There have been several promising battery technologies that have never made it to market, were pulled from the market or are otherwise generally too expensive or unavailable.  Evercel offered amazing new battery technology (nickel zinc) 6 years ago or so, but after a brief appearance on the market ( they were available thru Cabella's), the company issued a single license to a Korean company that doesn't seem to have done anything with the technology.  And in the early 90's, we were told we were imminently close to having production, affordable electromagnetic batteries (EMB's or flywheel energy storage systems) by several firms, yet now, 15+ years later, we still cannot go out and buy an affordable flywheel energy storage "battery" unit for electric vehicles.

 

Based on such experience, I'm a bit sensitive to marketing pitches and etherware promises.

 

-Moderator, Electricboats

 

>With respect to promising new battery chemistry, this Zinc-Air  might be cheaper and and safer than Lithium types. Compressed air takes a lot of energy to create, not very efficient because it wastes heat like crazy, at least it does in my shop air compressor!! !
>http://www.treehugg er.com/files/ 2009/10/zinc- air-battery- revolt-3- times-more- energy-lithium- ion-battery- electric- cars.php

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