Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 13-04-2014, 07:35   #106
Registered User

Join Date: Jan 2013
Location: ow heading north
Boat: 28m Steel Tug - two in tow
Posts: 77
Re: GreenCat 605 First Pictures

Ever hear about Dreamliner batteries? Those batteries manage to catch fire every now and then.
__________________

__________________
Capt Bert Q
taking some time off - Falkland Islands
reefhunter is offline   Reply With Quote
Old 14-04-2014, 12:49   #107
Registered User
 
mikethedane's Avatar

Join Date: Mar 2014
Location: Monaco
Boat: jeps got it
Posts: 132
Send a message via Skype™ to mikethedane
Re: GreenCat 605 First Pictures

just the an email from the africacat and wow it is impressive.. makes wonder if i should upgrade my budget .. looks really realy need i must say
__________________

__________________
//Mike
Starting to Cruise in 2015
mikethedane is offline   Reply With Quote
Old 14-04-2014, 13:29   #108
Registered User
 
deckofficer's Avatar

Join Date: Feb 2011
Location: Northern and Southern California
Boat: too many
Posts: 4,198
Images: 4
Re: GreenCat 605 First Pictures

Quote:
Originally Posted by reefhunter View Post
Ever hear about Dreamliner batteries? Those batteries manage to catch fire every now and then.
Why do folks keep bringing this up? We are talking about LiFePO4 batteries, not LiPO. We give up a lot of energy density over LiPO, but what we get in return is a battery safer than lead acid with 3 times the usable a-hr and 5 times the cycle life.

It is apples and oranges every time someone compares Dreamliner lithium batteries to the type of lithium we are using on our boats.
__________________
Bob
USCG Unlimited Tonnage Open Ocean (CMA)
http://tbuckets.lefora.com/
deckofficer is offline   Reply With Quote
Old 14-04-2014, 14:01   #109
Registered User

Join Date: May 2008
Posts: 1,969
Re: GreenCat 605 First Pictures

Comparing fires from a Dreamliner LIPO battery to LiFePO4 is like saying marine diesels blow up like propane stoves.

And I was just on a 787. Lovely plane. Didn't worry about the batteries for a moment

(Now the in-flight meal did worry me -- it didn't look or taste like the promised chicken)
__________________
CarlF is online now   Reply With Quote
Old 14-04-2014, 17:00   #110
Senior Cruiser
 
senormechanico's Avatar

Cruisers Forum Supporter

Join Date: Aug 2003
Boat: Dragonfly 1000 trimaran
Posts: 5,830
Re: GreenCat 605 First Pictures

Quote:
Originally Posted by deckofficer View Post
Why do folks keep bringing this up? We are talking about LiFePO4 batteries, not LiPO. We give up a lot of energy density over LiPO, but what we get in return is a battery safer than lead acid with 3 times the usable a-hr and 5 times the cycle life.

It is apples and oranges every time someone compares Dreamliner lithium batteries to the type of lithium we are using on our boats.
It's just the uninformed bringing it up.
Like before we went cruising.

"But what about pirates, storms, banditos?" and my favorite, "What do you DO all day?" ad nauseum.
__________________
Memento,homo, quia pulvis es, et in pulverem reverteris.
senormechanico is online now   Reply With Quote
Old 14-04-2014, 17:03   #111
Senior Cruiser
 
senormechanico's Avatar

Cruisers Forum Supporter

Join Date: Aug 2003
Boat: Dragonfly 1000 trimaran
Posts: 5,830
Re: GreenCat 605 First Pictures

Quote:
Originally Posted by CarlF View Post
Comparing fires from a Dreamliner LIPO battery to LiFePO4 is like saying marine diesels blow up like propane stoves.

And I was just on a 787. Lovely plane. Didn't worry about the batteries for a moment

(Now the in-flight meal did worry me -- it didn't look or taste like the promised chicken)
Watch out for the FISH !!



__________________
Memento,homo, quia pulvis es, et in pulverem reverteris.
senormechanico is online now   Reply With Quote
Old 15-04-2014, 05:47   #112
Registered User

Join Date: Jan 2013
Location: ow heading north
Boat: 28m Steel Tug - two in tow
Posts: 77
Re: GreenCat 605 First Pictures

Quote:
Originally Posted by deckofficer View Post
Why do folks keep bringing this up? We are talking about LiFePO4 batteries, not LiPO. We give up a lot of energy density over LiPO, but what we get in return is a battery safer than lead acid with 3 times the usable a-hr and 5 times the cycle life.

It is apples and oranges every time someone compares Dreamliner lithium batteries to the type of lithium we are using on our boats.
Lithium is still Lithium. At $295US a battery, I'll stay with my NiCd. I noted GM chose another battery for their cars - not the LiFePO4 - must have been another reason besides price. If I replace all my batteries - it will cost me a week's pay. Research shows that the promise of 2000 cycles at 70% DoD and a 10 year service life. But no one has demonstrated that yet.
__________________
Capt Bert Q
taking some time off - Falkland Islands
reefhunter is offline   Reply With Quote
Old 15-04-2014, 05:54   #113
Registered User

Join Date: Jan 2013
Location: ow heading north
Boat: 28m Steel Tug - two in tow
Posts: 77
Re: GreenCat 605 First Pictures

Quote:
Originally Posted by CarlF View Post
Comparing fires from a Dreamliner LIPO battery to LiFePO4 is like saying marine diesels blow up like propane stoves.
No, but I don't want to be around either when they do!

Quote:
And I was just on a 787. Lovely plane. Didn't worry about the batteries for a moment
Congrats - I take it your life insurance was paid up? It's only a matter of time. My son is a pilot for a cargo carrier and down graded to a 744. That is he was rated for 777/787 and didn't want to fly one. He just feels safer with 4 engines. Boeing is buying back the undelivered jets b/c of wing cracks.
__________________
Capt Bert Q
taking some time off - Falkland Islands
reefhunter is offline   Reply With Quote
Old 15-04-2014, 10:14   #114
Registered User
 
deckofficer's Avatar

Join Date: Feb 2011
Location: Northern and Southern California
Boat: too many
Posts: 4,198
Images: 4
Re: GreenCat 605 First Pictures

Quote:
Originally Posted by reefhunter View Post
Lithium is still Lithium. At $295US a battery, I'll stay with my NiCd. I noted GM chose another battery for their cars - not the LiFePO4 - must have been another reason besides price. If I replace all my batteries - it will cost me a week's pay. Research shows that the promise of 2000 cycles at 70% DoD and a 10 year service life. But no one has demonstrated that yet.
We keep meeting up on these threads, the tow and the towed. Since you said you haven't towed a semi-sub yet, we haven't met on the high seas.

I would think GM and others in the automotive market would chose a lithium chemistry with a much higher energy density than LiFePO4.

My LiFePO4 cells are over 5 years old with 382 cycles to 80% DOD and on a capacity test still deliver 17% more than their rating. If they do 2000 cycles, which I think they will, they were cheaper than lead.

Lead is dead.
__________________
Bob
USCG Unlimited Tonnage Open Ocean (CMA)
http://tbuckets.lefora.com/
deckofficer is offline   Reply With Quote
Old 15-04-2014, 10:51   #115
Registered User

Join Date: May 2008
Posts: 1,969
Re: GreenCat 605 First Pictures

Lithium is used in an incredible range of battery chemistry. They are most definitely not all the same. I recently saw a demonstration of a "Lithium-Air" battery that uses the oxygen in room air as the oxidizer. It had about 5 times the energy density of other Lithium batteries (although this one had the notable flaw of not being rechargable )

Even LiFePO4 cycle life and density also vary tremendously usually due to different manufacturing methods, additives, and quality. There's an incredibly number of really bad LiFePO4 batteries being made in China. Most, fortunately, don't make it to the US or Europe.

Batteries are getting a huge amount of attention. ARPA-E the US government's research funding arm has a special program just for electric vehicle batteries. Here's a list of the projects they funded in the last year. VC's are also pouring money into the field.

http://www.arpa-e.energy.gov/sites/d...ons_082013.pdf

Five years from now, there will be even better - much better - battery choices for boats.
__________________
CarlF is online now   Reply With Quote
Old 15-04-2014, 11:39   #116
Registered User
 
neelie's Avatar

Join Date: Oct 2007
Location: On the boat
Boat: Valiant 50
Posts: 514
Re: GreenCat 605 First Pictures

Quote:
Originally Posted by CarlF View Post

Five years from now, there will be even better - much better - battery choices for boats.

Five years from now, we will be having the same online debate with the modern day Luddites
__________________
The light at the end of the tunnel are no longer the headlights of the oncoming train......yippee
neelie is offline   Reply With Quote
Old 16-04-2014, 09:05   #117
Registered User

Join Date: Jan 2013
Location: ow heading north
Boat: 28m Steel Tug - two in tow
Posts: 77
Re: GreenCat 605 First Pictures

Quote:
Originally Posted by neelie View Post
Five years from now, we will be having the same online debate with the modern day Luddites
Five years from now the Luddites and Druids will be in charge and I'll be farming in the RSA
__________________

__________________
Capt Bert Q
taking some time off - Falkland Islands
reefhunter is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 14:56.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.