you have all the stuff for it to work and you manage your load so that you stay away from limits. Should work great under those conditions.
But lithium has its problems. FAA has restrictions on lithium batteries (including lithium-ion batteries) in both carry-on and checked baggage on US flights.
The FAA is simply addressing the issue of lithium batteries spontaneously combusting, which has gotten plenty of press in the last few years. You don't need to crush one, you don't need to charge one, you don't need to use one. Just put it on the shelf, and some of them will spontaneously combust. Apparently there are some problems in the manufacturing processes and some defective batteries can just start to burn. Most likely during charging--but given the temperature and pressure changes (even in the airplane cabin) that might be enough "squeezing" to set one off.
Mechanical sensitivity is not an endearing quality. The $45,000 dollar complaint some Tesla owners have experienced also is not endearing. If you are not familiar with that story it is about parking your Tesla for a couple of weeks and coming back to a failed battery pack which they (Tesla) don't warranty. I believe the moral of this story is parasitic loads and BMS leaks have to be anticipated and you MUST have power available if shore power is interrupted for appreciable time.
A friend of mine used to race bikes and is still active in the wrenching end of the sport. Read this post and tell me what you think -
Chiming in with real world experience on Shorai. I've not been successful starting my KTM990 when left out overnight below 45 degrees despite following several "warm up" procedures. I went back to the stock lead acid battery. Shorai sent me a replacement but I have not been able to test it yet.
May save a few pounds but only starts when it is nice. Again, not endearing.
I am glad you are having a positive experience with your installation. May you have many more positive experiences. But I would motor voltage like a hawk and have an alarm for low voltage. The Tesla experience can be duplicated elsewhere.
Is there a perfect chemistry? No. Is there a chemistry you can take for granted and forget about when you leave on holiday? That would be prudent.
If you are gone and the cord gets pulled out of the power socket or the circuit breaker trips you can get in deep kim chee with lithium. Probably not in 2 weeks like the Tesla owners but unsettling non the less.
All the best
Kirk
Love is so short, forgetting is so long.
From: Ned Farinholt <nedfarinholt@comcast.net>
To: electricboats@yahoogroups.com
Sent: Tuesday, June 12, 2012 9:19 AM
Subject: Re: [Electric Boats] NiMH Batteries Suppressed
There are those of us who rather like lithium. I have had a 16 cell 160 ah bank for over a year with very fine performance. I have a bms but the charger and a total battery monitor, i.e., fuel gauge, have managed the bank to the point that neither the bms alarm nor shut-down have ever gone on. I am operating with a 0.5C load. There is no need for a blanket condemnation when they may be the best solution for some applications. My app is to go fairly fast (10-15 knots) for a long way (25+ nm). It works.
Ned
P.S. Love is giving of oneself for the good of the beloved. It can last forever.
On Jun 12, 2012, at 11:49 AM, Kirk McLoren wrote:
the patents control all batteries regardless of the application.Lithium is a PITA. each battery requires a BMS.Love is so short, forgetting is so long.
From: danbollinger <no_reply@yahoogroups.com>
To: electricboats@yahoogroups.com
Sent: Tuesday, June 12, 2012 5:14 AM
Subject: [Electric Boats] Re: NiMH Batteries Suppressed
Right. I got that reversed. The patents control all-electric vehicles, but not hybrids. Sadly, NiMH are much more easily recycled than Lithium-ion.
--- In electricboats@yahoogroups.com, Craig Carmichael <craig@...> wrote:
>
> >I believe there is some sort of contract, patent, or combination of
> >both, possibly from GM, that requires hybrids to only use NiMH.
> >
>
> It is the opposite. Since the success of GM's EV-1 [see video "Who
> Killed the Electric Car"] Chevron acquired Ovonics from GM, and via
> its morphing proxies Cobasys and now "Ovonics reborn"(?) has acquired
> 125 patents for metal hydrides and simply won't let ANYBODY, ANYWHERE
> build big flooded NiMH batteries.
>
> The writing is on the wall: try to make them and you'll get a "stop
> work" injunction and be tied up in court until bankruptcy. Whether or
> not any of the patents were violated. No sane investor would touch
> that. (And I'll bet almost none of the 125 inventors got much of
> anything, since their inventions have gone to waste as usual.) No
> wonder China "doesn't honor" [technology murder by] US patents.
>
> That's the main reason lead-acid isn't EXTINCT, because as Kirk
> surmises the prices would be economical - only somewhat more, and the
> batteries far superior and way longer lasting.
>
> That's also why the NiMH D cells have been so well developed and have
> amazing specs, and are being used as hybrid batteries. But they cost
> double(?) what big flooded cells would.
>
> And it's also the main reason there are big lithium batteries. These
> snuck past while they were busy supressing NiMH because they were so
> high priced and so 'touchy' in operation that the gangster owners of
> "big oil" thought no one would use them.
>
> And it was my original impetus to try, first 'simply' to make NiMH's
> (Jan.2008), and then as I learned more, to create a new higher energy
> economical battery chemistry.
>
> Craig
>
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