Go Back   EcoModder Forum > EcoModding > Fossil Fuel Free
Register Now
 Register Now
 

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 03-04-2008, 09:35 PM   #31 (permalink)
Ford Escort 2.0
 
TomEV's Avatar
 
Join Date: Feb 2008
Location: Alameda, CA
Posts: 240

Electricar - '89 Ford Escort LX Hatchback
Thanks: 6
Thanked 27 Times in 24 Posts
Excellent point about fresh lead

My daily commute is 10 miles (5 each way) so instead of hauling around an extra 130 pounds of batteries, I went with six 8v (less expensive as well). My SOC doesn't get below 50%, so I should get good battery life. I planned the number of batteries based on the information in the 'battery FAQ'. Time will tell if it works out.

If I had to go 15 or 20 miles a day, it would have been worth getting the extra two batteries so the SOC wouldn't get too low, and I wouldn't worry about an extra mile or two beyond 20 miles for errands.

From the 'battery FAQ' -

If a battery is discharged to 50% every day, it will last about twice as long as if it is cycled to 80% DOD. If cycled only 10% DOD, it will last about 5 times as long as one cycled to 50%. Obviously, there are some practical limitations on this - you don't usually want to have a 5 ton pile of batteries sitting there just to reduce the DOD. The most practical number to use is 50% DOD on a regular basis. This does NOT mean you cannot go to 80% once in a while. It's just that when designing a system when you have some idea of the loads,
you should figure on an average DOD of around 50% for the best storage vs cost factor. Also, there is an upper limit - a battery that is continually cycled 5% or less will usually not last as long as one cycled down 10%.

__________________
  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 03-05-2008, 08:27 AM   #32 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,033

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 53.56 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 61.98 mpg (US)

Fancy Metro - '14 Mitsubishi Mirage top spec
90 day: 58.72 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 58.34 mpg (US)
Thanks: 3,668
Thanked 6,486 Times in 3,361 Posts
How are you measuring SOC? I have yet to get a hydrometer, and I understand that's what's needed to do it right.
__________________
Latest mods: 3-cylinder Mitsubishi Mirage. EcoMods now in progress...
Ecodriving test:
Manual vs. automatic transmission MPG showdown



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote
Old 03-05-2008, 12:18 PM   #33 (permalink)
Ford Escort 2.0
 
TomEV's Avatar
 
Join Date: Feb 2008
Location: Alameda, CA
Posts: 240

Electricar - '89 Ford Escort LX Hatchback
Thanks: 6
Thanked 27 Times in 24 Posts
I measured SOC with a hydrometer for the first few trips I made with the new pack, but haven't measured it within the past four months. Seems these days that I am less worried about reliability, and 'just drive it'. It has proven to be really easy to maintain - I look at the battery water once a month, and make sure the battery cables are tight/not hot at the same time.
__________________
  Reply With Quote
Old 06-27-2008, 10:50 PM   #34 (permalink)
Wannabe
 
WannabeEVer's Avatar
 
Join Date: Jun 2008
Location: Saskatchewan
Posts: 15
Thanks: 0
Thanked 0 Times in 0 Posts
I think there has to be a way to produce some energy while you're driving like Chris said. At least enough to slow the draining of the battery power. There are so many sources you could get energy from: the wind resistance, the spinning tires, maybe even heat from the controller. Why not attach a sprocket or something to one of the back wheels and have it spinning a small generator inside the car? The laws of thermodynamics are just theories...and its not like no ones ever broken a law before. Even on youtube I've seen people who have made magnetic motors that use little energy, if any at all to start.
__________________
Last night I lay in bed looking up at the stars in the sky and I thought to myself, where the heck is the ceiling.
  Reply With Quote
Old 07-05-2008, 03:13 PM   #35 (permalink)
EcoModding Lurker
 
Join Date: Jun 2008
Location: Connecticut
Posts: 52
Thanks: 0
Thanked 0 Times in 0 Posts
I wish there was more design for some type of reverse balanced clutch as a braking mechanism.

1) Put on brakes a little and the BRAKE CLUTCH slowly engages the engine as a generator on the car.
2) Apply more brakes and the BRAKES convert to standard friction brakes and really stop the car.
  Reply With Quote
Old 12-04-2008, 10:26 AM   #36 (permalink)
Batman Junior
 
MetroMPG's Avatar
 
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,033

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
90 day: 53.56 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 61.98 mpg (US)

Fancy Metro - '14 Mitsubishi Mirage top spec
90 day: 58.72 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 58.34 mpg (US)
Thanks: 3,668
Thanked 6,486 Times in 3,361 Posts
Just checked into the twin's thread: I don't think he was happy with the performance of his batteries (range), so...
Quote:
Big news: I ordered lithium batteries from China. They should be in within 2 months. I am hoping to get 25 - 30 mile range once I have the new pack in.
http://electricmetro.blogspot.com/

__________________
Latest mods: 3-cylinder Mitsubishi Mirage. EcoMods now in progress...
Ecodriving test:
Manual vs. automatic transmission MPG showdown



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
  Reply With Quote
Reply  Post New Thread


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Expanding, sprayable foam as an aero construction / shaping material MetroMPG Aerodynamics 10 01-18-2013 03:04 AM



Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com