GreenHybrid Interactive Hybrid Car Resource
Home Discuss Articles Compare Share Shop
GreenHybrid.com   Hybrid Car Forums   Tech Information   Mileage & Specs   Photo Gallery   Buying Guide  
GreenHybrid Mileage Database - Click here to track your MPG! Join Hybrid car discussions today - Create a FREE GreenHybrid Account

Go Back   GreenHybrid - Hybrid Cars > Hybrid Cars > Ford Motor Company > Ford Escape Hybrid
Sign in using an external account
Register Forgot Password?
Register Photos FAQ Members Search Today's Posts Mark Forums Read Vendor DirectoryGarageUsed Cars Add a Tank

Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1 (permalink)  
Old 01-25-2010, 01:52 PM
Active Enthusiast
 
Real Name: hal lewis
Location: santa barbara
Hybrids: 2006 escape
Posts: 59
Default LV battery

I had an amazing experience when I tried to start my 2006 Escape Hybrid over the weekend. Flashing lights, beeping alarms, furiously clicking relays, etc. Continued even after I removed the key. Nothing like that in my experience. The service guy I called said that that is the car's normal signal that the LV battery needs recharging, but nothing in my literature says so. Is that true?

Hal
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
  #2 (permalink)  
Old 01-25-2010, 04:59 PM
Pretty Darn Active Enthusiast
 
Real Name: Don
Hybrids: 2007 FEH 4WD
Posts: 284
Default Re: LV battery

If you don't want to go to a Ford dealer, a lot of places can test your 12v battery (assuming that's what you mean by LV). Since yours is probably a few years old already and it's wintertime, it could be on its last legs. If it's dead you won't be stranded, just make sure you read up how to do an emergency start from the HV battery.
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
  #3 (permalink)  
Old 01-25-2010, 07:00 PM
Active Enthusiast
 
Real Name: hal lewis
Location: santa barbara
Hybrids: 2006 escape
Posts: 59
Default Re: LV battery

Thanks, but I really wanted to know if it is true that the car signals low battery (LV, meaning low voltage, meaning 12v) by putting on the fireworks display. That's the real question.

I know how to test a battery, and this one (six cells) had four good cells on the inside, and two bad cells, one at each end, enough to supply a solid 12v. It's supposed to be a maintenance-free battery, so shouldn't run out of water in a mere four years. If I knew for sure that the problem was a low battery, it's no big deal to install a new one---I've done it dozens of times.

Hal
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
  #4 (permalink)  
Old 01-26-2010, 04:42 AM
Enthusiast
 
Real Name: Chris
Location: Michigan
Hybrids: 2009 FEHL
Posts: 28
Default Re: LV battery

I had the same experience with a bad battery and I got all of the beeps clicks and lights that you saw. Dealer replaced battery under warranty and problem solved!

Hope this helps.
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
  #5 (permalink)  
Old 01-26-2010, 08:31 AM
Ridiculously Active Enthusiast
 
Real Name: willard west
Location: Beautiful Pacific NW
Hybrids: 2003 Prius
Posts: 1,678
Default Re: LV battery

Quote:
Originally Posted by hallewis View Post
Thanks, but I really wanted to know if it is true that the car signals low battery (LV, meaning low voltage, meaning 12v) by putting on the fireworks display. That's the real question.

I know how to test a battery, and this one (six cells) had four good cells on the inside, and two bad cells, one at each end, enough to supply a solid 12v. It's supposed to be a maintenance-free battery, so shouldn't run out of water in a mere four years. If I knew for sure that the problem was a low battery, it's no big deal to install a new one---I've done it dozens of times.

Hal
It is not at all unusual for an intrusion alarm to trigger when 12 volts is restored after a period of low voltage or no voltage. Your battery was low before you inserted the key, once you inserted the key the 12 volt battery began to be recharged via the hybrid battery, quickly rose to ~12 volts, and that triggered the alarm.

"...enough to supply a solid 12v..."

No, NOT, not by any means.

Each cell can supply 2.25 volts, TOPS, under load. Don't let the terminal voltage during charging fool you.

"...shouldn't run out of water in a mere 4 years.."

That is entirely a function of how often you bring the battery down to a seriously low charge and even moreso how rapidly it gets recharged. Top off the "water", put an almost dead battery on a rapid recharger and the electrolyte will begin to boil over within minutes.
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
  #6 (permalink)  
Old 01-26-2010, 01:47 PM
Active Enthusiast
 
Real Name: hal lewis
Location: santa barbara
Hybrids: 2006 escape
Posts: 59
Default Re: LV battery

Thanks, wwest, that's useful (I live in the twest, meaning tame west). It never occurred to me that it is not a stupid signal of a low battery, but the intrusion alarm, triggered by the voltage fluctuation. That makes more sense. and of course I now have a new battery in place, so the incident is history (I hope).

And yes, the 4+-celled battery was delivering a solid 12 volts, I checked it, so the outer cells were low, but not in rigor mortis. I really do know the difference between the battery voltage and the charging voltage.

And no, this battery was never mistreated or brought down to a low charge, though it was indeed low after the event.

This is all beginning to hang together, and here is my interpretation. Back in October I got rear-ended by the traditional teen-ager driving a friend's car (stop-and-go traffic, in which I was stopped and he was go-go). He claimed he was "only" going 40 mph. In the collision the battery certainly got a lot of horizontal acceleration, but seemed OK. My guess is that it sustained some hairline cracks in its case, which oozed enough of its electrolyte in the three months to lower its voltage, but so slowly that it wasn't noticeable. Then the sequence was as you described.

The reason the fancy flashing display isn't mentioned in the literature as a sign of a low battery is that it really isn't. The designers intended it as an intrusion alarm, which should indeed be spectacular, but didn't foresee all the other non-intrusion events that could trigger it. This was one of those, and there are probably others. (It always troubled me to think that they would design a low-battery alarm that turned on lights, further depleting the battery. They didn't; their error was not considering this particular source of a false alarm.)

So your posting was right on target, and I thank you again.

Hal
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
  #7 (permalink)  
Old 01-26-2010, 06:59 PM
Ridiculously Active Enthusiast
 
Real Name: willard west
Location: Beautiful Pacific NW
Hybrids: 2003 Prius
Posts: 1,678
Default Re: LV battery

I don't have any idea why but over the years I have noticed that with failed/failing lead-acid batteries they do seem to have a high propensity for the "end" cells to be drier than "inside" cells.

Oops....terminal voltage...

yes, I would expect that with NO LOAD a battery with dead, DEAD, cells might still measure 12 VDC, but add even a slight load and.....

I'm also curious just how you measured each cell individually...I have often probed, voltmeter probes, the connection structure inside the battery through the refill openings but often with results that I could not make good sense of. Yesteryear it was easier with the cell interconnects exposed.

Last edited by wwest; 01-26-2010 at 07:05 PM.
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
  #8 (permalink)  
Old 01-26-2010, 07:23 PM
Active Enthusiast
 
Real Name: hal lewis
Location: santa barbara
Hybrids: 2006 escape
Posts: 59
Default Re: LV battery

Oh, I did not measure the voltages individually---that's very hard with modern batteries---but measured the total voltage and did the voltage measurement with an old voltmeter that draws about 5 ma (1000 ohms/volt on the 20v scale), so it wasn't much but it wasn't zero drain EMF.

On top of that I measured the specific gravity of the electrolyte in each cell---the two outer ones being way down, and the four inner ones being quite healthy. If there is no leakage that's a direct measurement of the charge state of the cell. But I'm guessing that there was leakage here, so it's hard to say anything quantitative. Still, if the healthy inner ones were delivering 2.2v, and the total was 12v, each of the outer ones could have been delivering 1.6v, which is consistent with their specific gravity. So it all hangs together.

I suppose I could have claimed a pro-rated warranty on the old battery, which was only four years old, but forgot.

Hal
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiTweet this Post!
Reply With Quote
Old 01-26-2010, 07:23 PM
 
 
 
Reply

Tags
12v, 2006, alarm, batteries, battery, camry, car, draining, escape, ford, hybrid, low, lv, sign, voltage

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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

Similar Threads
Thread Topic Starter Forum Replies Last Post
12 Volt Battery Replacement / Upgrade on a 2007 Toyota Camry Hybrid with photos Captain Jim Toyota Camry Hybrid 156 07-12-2014 06:36 PM
IMA battery isn't charging anymore. Hot_Georgia_2004 Honda Civic Hybrid 14 06-01-2012 10:21 AM
12V Battery Replacement GaryG Ford Escape Hybrid 81 04-10-2012 12:11 PM
Who is the company that replaces factory batteries with more powerful ones? nicst47 Ford Escape Hybrid 17 09-18-2008 10:07 AM
When the battery fails bwilson4web Toyota Prius 15 05-05-2007 08:47 AM



All times are GMT -7. The time now is 05:18 AM.

Home | Hybrid Discussion Forums | Hybrid Articles Archive | Mileage Database | Hybrid Photo Galleries | Compare Vehicles
Terms of Service - Privacy Statement - - Advertising
GreenHybrid.com, Copyright 2008
InternetBrands.com Automotive Network

GreenHybrid.com founded by Jason Siegel.
Emails Backup

SEO by vBSEO 3.5.2

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73