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01-21-2013, 06:06 PM | #976 |
Scooby Specialist
Member#: 260501
Join Date: Oct 2010
Chapter/Region:
AKIC
Location: Anchorage, Alaska
Vehicle:2003 miata SE Blurple |
It looks very good, and it's clearly cbr in person, much better than the usdm red.
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01-21-2013, 08:13 PM | #977 |
Scooby Guru
Member#: 22923
Join Date: Aug 2002
Chapter/Region:
International
Location: above 8000 rpm!
Vehicle:2002 EJ207 V8 1.5xtr TWIN-SCROLL Black Bugeye |
Alignment at Continental. Got to see Jake, Vern and Derek. Kaitlin popped in too.
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01-22-2013, 01:44 AM | #978 |
Scooby Specialist
Member#: 276443
Join Date: Mar 2011
Chapter/Region:
TXIC
Location: Abilene, TX
Vehicle:2005 2.1 stroker WRX OBP |
New wiper blades!
Anyone else always firget how the old ones come off?? Sheesh |
01-22-2013, 03:50 PM | #979 |
Scooby Specialist
Member#: 190003
Join Date: Sep 2008
Chapter/Region:
NWIC
Location: Spokane WA
Vehicle:2007 STI White |
Lithium Battery
Hey guys. Been awhile since I've posted much here
I put together a sweet ~5-6 lb lithium battery with 960 amp capacity for 10 seconds then 540 continuous until drained. Should be something like 500 - 600 cold cranking amps and It's done great so far at -10f without being warmed. Took out a stock size 32lb battery + probably ~3lb of mounting hardware and used the existing 4ga wire running to the trunk to put it under driver's seat. I set it on top of a welding pad just in case, and I made a Lexan case for it. I also put a battery heater in there with a diode in-line to cut power in half from 60w to 30w so it doesn't get too hot. Cranks over faster due to being ~13-14 volts at full charge instead of 12.5ish. This lithium chemistry is much safer than LiPolymer and won't catch fire or experience run-away charge. Supposedly also has higher charge efficiency than your standard Lead-Acid battery (like 90-95% vs 80ish?) All in all I think it was well worth the effort of making it. Saved ~25lb and centralized mass |
01-22-2013, 04:14 PM | #980 | |
Former Vendor
Member#: 241881
Join Date: Mar 2010
Chapter/Region:
AKIC
Location: 907-355-6655 text or phone
Vehicle:2014 P3 Import Auto AWD Dyno, Mods, etc |
How are you handling charge control? It was my understanding that LI-ION batteries had to be temp monitored and not charged completely all the time. At full charge the batteries will suffer loss of capacity over time that gets worse with heat.
I always thought about doing what you are doing but I would be concerned with the under hood temps both high temps and low (below freeze point) temps. I see you added some current control and moved it inside the car that was a good idea. Seems like a killer great idea for track day and short term use, especially if mounted away from heat. I don't think however it would be a great permanent replacement without some more environmental controls? Are these cells something new that has overcome the traditional cons of lithium ion cells when it comes to runaway charging? It seems that even though you limited the current it will still charge (slower) until its full. Dunno..Cool stuff though sir! From wiki:
If overheated or overcharged, Li-ion batteries may suffer http://en.wikipedia.org/wiki/Thermal_runaway and cell rupture.[52] In extreme cases this can lead to combustion. Deep discharge may short-circuit the cell, in which case recharging would be unsafe. To reduce these risks, Lithium-ion battery packs contain fail-safe circuitry that shuts down the battery when its voltage is outside the safe range of 3–4.2 V per cell. When stored for long periods the small current draw of the protection circuitry itself may drain the battery below its shut down voltage; normal chargers are then ineffective. Many types of lithium-ion cell cannot be charged safely below 0°C. Other safety features are required in each cell:
These safety issues present a problem for large scale application of such cells in Electric Vehicles; A dramatic decrease in the failure rate is necessary. Quote:
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01-22-2013, 04:26 PM | #981 |
Scooby Specialist
Member#: 190003
Join Date: Sep 2008
Chapter/Region:
NWIC
Location: Spokane WA
Vehicle:2007 STI White |
They're LiFePO4 - lithium iron phosphate.
Charging mode is just straight up alternator "CV" constant voltage - this chemistry is fine with that method. Full charge is at 14.4 volts (3.6v per cell). I'm not limiting current as each cell can take up to 10C charge so each bank of cells can take 23amps. I wired up 8 in series so it's more than the alternator can put out making it safe. I DID put a diode to bump the voltage output of the alternator when I put the stock battery in the trunk - I took that out after putting battery in since It was hitting ~15 volts on startup. Now it goes to 14.5-14.6 then drops to 14 during normal driving and occasionally hits 14.4 on longer highway drives (since alternator gets cold). These can accept charges above 15v olts without damaging them, provided you don't do it continuously I was saying i put a diode inline with the battery heater I threw in to ensure things don't get too toasty . Since it's AC it'll block half of the sine wave and we'll assume i'm giving only 30W of power for heating the battery. Last edited by AKSubieDubie; 01-22-2013 at 04:33 PM. |
01-22-2013, 04:29 PM | #982 |
Scooby Guru
Member#: 22923
Join Date: Aug 2002
Chapter/Region:
International
Location: above 8000 rpm!
Vehicle:2002 EJ207 V8 1.5xtr TWIN-SCROLL Black Bugeye |
What are the costs involved AkSubieDubie?
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01-22-2013, 05:17 PM | #983 | |
Former Vendor
Member#: 241881
Join Date: Mar 2010
Chapter/Region:
AKIC
Location: 907-355-6655 text or phone
Vehicle:2014 P3 Import Auto AWD Dyno, Mods, etc |
Ok I misread the first time on the current limiting.
Yes I see the LiFePO4 have overcome a lot of the dangers of the traditional Li-ion cells. Well sir if you found a source for these cells cheap you may be on to something good! Quote:
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01-22-2013, 06:32 PM | #984 |
Scooby Specialist
Member#: 190003
Join Date: Sep 2008
Chapter/Region:
NWIC
Location: Spokane WA
Vehicle:2007 STI White |
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01-22-2013, 06:35 PM | #985 |
Scooby Specialist
Member#: 260501
Join Date: Oct 2010
Chapter/Region:
AKIC
Location: Anchorage, Alaska
Vehicle:2003 miata SE Blurple |
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01-23-2013, 12:56 AM | #986 |
Scooby Guru
Member#: 22923
Join Date: Aug 2002
Chapter/Region:
International
Location: above 8000 rpm!
Vehicle:2002 EJ207 V8 1.5xtr TWIN-SCROLL Black Bugeye |
This is me laughing***8230;not in a good way. While I admire your ingenuity and determination, I question the common sense. Look here http://www.braillebattery.com/index...._batteries/g4l Hey, to each, their own! This is me laughing in a good way. Last edited by Nomadgene; 01-25-2013 at 02:39 AM. |
01-23-2013, 01:37 AM | #987 | |
Scooby Specialist
Member#: 283145
Join Date: May 2011
Chapter/Region:
AKIC
Location: Anchorage, AK
Vehicle:1997 LEGASTi Wagon Instagram-@grannywagon |
Quote:
Last edited by granny; 01-23-2013 at 01:44 AM. |
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01-23-2013, 01:38 AM | #988 |
Scooby Guru
Member#: 92894
Join Date: Aug 2005
Chapter/Region:
BAIC
Location: nomo splitting lanes LOL
Vehicle:2015 Wrx - fury kit silver duh |
^^ SO wrong!! lol
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01-23-2013, 02:26 AM | #989 |
Scooby Specialist
Member#: 59057
Join Date: Apr 2004
Chapter/Region:
AKIC
Location: Alaska
Vehicle:2004 Impreza, STi. Silver |
Get and Odyssey PC680 and be done with it. Amazon has them on the cheap.
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01-23-2013, 04:45 AM | #990 |
Scooby Specialist
Member#: 301431
Join Date: Nov 2011
Chapter/Region:
AKIC
Location: Anchorage, AK
Vehicle:2005 Evolution VIII |
dang... i want new parts
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01-23-2013, 10:49 AM | #991 |
Scooby Specialist
Member#: 253304
Join Date: Jul 2010
Chapter/Region:
AKIC
Location: Eagle River, AK
Vehicle:2001 Impreza 2.5RS Plus MOAR |
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01-23-2013, 11:48 AM | #992 |
Scooby Guru
Member#: 159474
Join Date: Sep 2007
Chapter/Region:
NESIC
Location: Northbridge, MA
Vehicle:2017 Impreza Sport Lithium Red - OLDKID |
Kev, you have to be specific. Do you want new PERFORMANCE parts or new COSMETIC parts?
You know you want that Liberal front bumper. |
01-23-2013, 12:06 PM | #993 |
Scooby Newbie
Member#: 343823
Join Date: Jan 2013
Chapter/Region:
AKIC
Location: Wasilla Alaska
Vehicle:07 Impreza was NA Blue |
I did some basic PM, I do my best to stay up on it. So this time it was the valve cover and spark plug gaskets. I also did the spark plugs, figured since I was there.
image by PixelPerfect_ml, on Flickr |
01-23-2013, 05:19 PM | #994 |
Scooby Specialist
Member#: 301431
Join Date: Nov 2011
Chapter/Region:
AKIC
Location: Anchorage, AK
Vehicle:2005 Evolution VIII |
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01-24-2013, 03:09 AM | #995 |
Scooby Specialist
Member#: 283145
Join Date: May 2011
Chapter/Region:
AKIC
Location: Anchorage, AK
Vehicle:1997 LEGASTi Wagon Instagram-@grannywagon |
Granny getting her nightly wipe down before I put her to bed.
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01-24-2013, 07:38 AM | #996 |
Scooby Specialist
Member#: 292737
Join Date: Aug 2011
Chapter/Region:
AKIC
Location: Anchorage, AK
Vehicle:2004 Impreza WRX Aspen White |
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01-24-2013, 10:56 AM | #997 |
Scooby Specialist
Member#: 283145
Join Date: May 2011
Chapter/Region:
AKIC
Location: Anchorage, AK
Vehicle:1997 LEGASTi Wagon Instagram-@grannywagon |
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01-24-2013, 12:08 PM | #998 |
Scooby Specialist
Member#: 190003
Join Date: Sep 2008
Chapter/Region:
NWIC
Location: Spokane WA
Vehicle:2007 STI White |
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01-24-2013, 08:16 PM | #999 |
Scooby Specialist
Member#: 133535
Join Date: Nov 2006
Chapter/Region:
AKIC
Location: status racing
Vehicle:06 limited - mine ww evo 8 - hers |
What other weight mods have been to the car? To be honest im with sexy-bigs on this one. I could understand it if it was a space thing or the car was gutted... The new stm crash bar saves over 20lbs and is cheaper.
Granny those rears look good in that pic. |
01-24-2013, 09:26 PM | #1000 |
Scooby Specialist
Member#: 292737
Join Date: Aug 2011
Chapter/Region:
AKIC
Location: Anchorage, AK
Vehicle:2004 Impreza WRX Aspen White |
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