The drawbacks to NiMH is less energy density and due to Chevron Oil owning the rights to NiMH cells larger than the 10 a-hr D cells, 10 a-hr is the largest single cell available.
Bob
From: "white74@telus.net" <white74@telus.net>
To: electricboats@yahoogroups.com
Sent: Wednesday, November 13, 2013 7:36 PM
Subject: [Electric Boats] RE: Hello group
I will defer my opion to Bob who evidently has more experience / qualification on this matter
although the point of the tenergy cells was they are standard NiMH chemistry
---In electricboats@yahoogroups.com, <robert-lemke@...> wrote:
Don't tell the Navy SEALS that will deploy in one of these http://www.militaryaerospace.com/articles/2013/09/combat-submarine-batteries.html or myself and many others on the Cruiser's forum that have embraced LiFePO4 cells for marine use. http://www.cruisersforum.com/forums/f14/lifepo4-batteries-discussion-thread-for-those-using-them-as-house-banks-65069.html
Our hope on this group is to share marine electric propulsion and prefer experience and facts over hearsay.
Bob
From: "white74@..." <white74@...>
To: electricboats@yahoogroups.com
Sent: Wednesday, November 13, 2013 6:32 PM
Subject: [Electric Boats] RE: Hello group
The safety claim is based on something a friend of mine who builds underwater communication devices ... he told me that salt water and lithium is a potential for explosion
perhaps this is outdated information
---In electricboats@yahoogroups.com, <robert-lemke@...> wrote:Off base on the safety claim. Explain why you feel LiFePO4 cells posses a marine safety issue.Bob
From: "white74@..." <white74@...>
To: electricboats@yahoogroups.com
Sent: Wednesday, November 13, 2013 5:49 PM
Subject: RE: Re: RE: [Electric Boats] RE: Hello group
the original point was tenergy are standard NiMH cells .... Lithium cells have their own set of issues ... not safe for marine being the first priority---In electricboats@yahoogroups.com, <mark.internet@...> wrote:I picked up an escape hybrid pack for $350.00 after I had a bad experience with lead acid batteries.it is 5.5Ah cells, total volts 325. = 1787.5watts i believe.I guess I paid 195.80 per Kwh.If you could direct me to your source for .40/ Kwh with BMS, I would be interested.Mark
From: "boat_works@..." <boat_works@...>
To: electricboats@yahoogroups.com
Sent: Saturday, November 9, 2013 10:38:27 PM
Subject: RE: RE: [Electric Boats] RE: Hello group
Hi Myles,I'm not sure what "40c/kwh" is, but if it's 40 cents/kWh, then I wish had I that deal instead of the $418/kWh (without BMS) that I paid for my 180Ah CALBs!-Tom---In electricboats@yahoogroups.com, <matwete@...> wrote:"my only question on the ford escape cells is why use sanyo 5.5 ah cells when the tenergey ones are rated at 10 ah?"Why stop there?e.g. "why use 10ah Tenergy cells when you can use 17.5ah Enerdel cells"Or, "why use 17.5ah Enerdel cells when you can buy a 35ah, 48v Enerdel module complete"Or, "why use any of those cells when you can bet CALB 40ah or 100ah cells"It's nice that we have lots of options with Lithium these days.For about 40c/kwh (including BMS), my pack's Enerdel modules have some of the highest quality (and power) cells.Better still, I don't have to mess with cells since the modules are already configured for 48v at the factory.Had the deal with these modules not presented itself, I'd have likely gone with 100ah CALB cells.But then, I don't know anything about these Tenergy or Sanyo cells.Are folks going with them because of some good price point?-Myles Twete, Portland
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