An online Ford Focus Electric Forum discussion group

It is currently Mon Oct 22, 2018 6:48 am

All times are UTC - 8 hours




Post new topic Reply to topic  [ 20 posts ]  Go to page Previous  1, 2
Author Message
PostPosted: Sat Sep 30, 2017 1:07 pm 
Offline

Joined: Tue Aug 16, 2011 11:40 am
Posts: 924
Location: Toledo, Ohio
davideos Not sure what the sight glass is for on the top of the battery. but my brand new one I cannot see anything so I guess I'd say it's black too. Sounds like you had something stay on that drained your battery.

Update: My car appears to be fixed now. I tried to charge the 12v friday night after I got it back. The battery must have been bad as it was steaming sulfuric acid in the morning after sitting on the charger over nite. I knew the battery was toast at this point for sure but S&G's I just let it go to see how long it would continue to start my car. It lasted until the following Wednesday. Took it back to the dealer again on that Friday and they replaced the battery under warranty.

_________________
2014 Blue Candy FFE
http://www.fuelly.com/car/ford/focus/2014/triangles/303811 (since this forum doesn't allow BBcode in sigs)


Top
 Profile  
 
PostPosted: Mon Oct 02, 2017 8:49 am 
Offline

Joined: Mon Jan 21, 2013 8:58 pm
Posts: 394
Location: So Cal
So I did get a new battery awhile ago....I think I posted about it on one of the threads. Although I wasn't sure at the time about the battery, I went to Costco to get another..."no more Motorcraft" I thought, but Costco didn't carry the battery I needed. After a lot of looking, I could not find a replacement battery in stock anywhere...except for the Ford Dealer...*sigh*. So I called up my service representative..who is really good..but she said that Ford will replace the battery if it dies under warranty, but after that, it isn't pro-rated...unless you bought it later. So in other words, the battery I had would not be pro-rated and so I had to buy another Motorcraft. Service adviser told me to be sure to save the receipt because I would need it.

The bubble on the battery is now green!

So I decided to load test the old battery before taking it back for a core deposit refund. I loaded it with a 12V camping refrigerator and, as it turns out, the battery had only a 4AH capacity from fully charged down to 10.5V, when the fridge automatically cuts out. I think the battery capacity is supposed to be over 50AH or more for this sized battery.

I've been running with the new battery for just over a month and I've had no issues.

Regards,
Davideos


Top
 Profile  
 
PostPosted: Mon Dec 04, 2017 7:29 am 
Offline

Joined: Tue Aug 16, 2011 11:40 am
Posts: 924
Location: Toledo, Ohio
davideos wrote:
I think the battery capacity is supposed to be over 50AH or more for this sized battery.

According to the MotorCraft service manual the OEM BTX 67R 390 battery is 43AH.

_________________
2014 Blue Candy FFE
http://www.fuelly.com/car/ford/focus/2014/triangles/303811 (since this forum doesn't allow BBcode in sigs)


Top
 Profile  
 
PostPosted: Mon Dec 04, 2017 5:12 pm 
Offline

Joined: Mon Jan 21, 2013 8:58 pm
Posts: 394
Location: So Cal
Thanks. I knew it was around 50, but didn't remember where I saw the capacity.


Top
 Profile  
 
PostPosted: Mon Dec 04, 2017 5:58 pm 
Offline

Joined: Fri Jul 14, 2017 4:53 am
Posts: 154
Location: Maryland
triangles wrote:
davideos Not sure what the sight glass is for on the top of the battery. but my brand new one I cannot see anything so I guess I'd say it's black too. Sounds like you had something stay on that drained your battery.

Update: My car appears to be fixed now. I tried to charge the 12v friday night after I got it back. The battery must have been bad as it was steaming sulfuric acid in the morning after sitting on the charger over nite. I knew the battery was toast at this point for sure but S&G's I just let it go to see how long it would continue to start my car. It lasted until the following Wednesday. Took it back to the dealer again on that Friday and they replaced the battery under warranty.

Steaming sulfuric acid... Still makes me wonder if one of the problems with these has to do with the high DC-DC voltage, I think I read 14.8V on FORScan Lite last time I checked. Haven't validated that with a multimeter though. 14.8V is awfully high to float a charge on a lead acid battery.

_________________
2017 Ford Focus Electric (Magnetic)
2017 Ford C-Max Energi SE (Kona Blue)


Top
 Profile  
 
PostPosted: Thu Dec 07, 2017 10:47 am 
Offline

Joined: Tue Aug 16, 2011 11:40 am
Posts: 924
Location: Toledo, Ohio
spirilis the acid steam was caused by my smart charger trying to desulfate the bad battery. I don't attempt to understand it but the smart charger uses some magic voodoo to try and break up the sulfation on the lead plates. Not sure if it's higher voltage, current pulses, or both but it got that battery hot and steaming. Franky I'm surprised it didn't just error out and say the battery was dead. My DC-DC converter is pretty standard at about 14.2V. I would think anything under 15V would be ok but I'm no 12V battery guru.

_________________
2014 Blue Candy FFE
http://www.fuelly.com/car/ford/focus/2014/triangles/303811 (since this forum doesn't allow BBcode in sigs)


Last edited by triangles on Mon Dec 11, 2017 12:12 pm, edited 1 time in total.

Top
 Profile  
 
PostPosted: Thu Dec 07, 2017 5:20 pm 
Offline

Joined: Fri Jul 14, 2017 4:53 am
Posts: 154
Location: Maryland
triangles wrote:
spirilis the acid steam was caused by my smart charger trying to desulfate the bad battery. I don't attempt to understand it but the smart charger uses some magic voodoo to try and break up the sulfation on the lead plates. Not sure if it's higher voltage, current pulses, or both but it got that battery hot and steaming. Franky I'm surprised it didn't just error out and say the battery was dead. My DC-DC converter is pretty standard at about 14.2V. I would think anything under 15V would be ok but I'm not 12V battery guru.

Gotcha... high frequency current pulses usually invoked by a high voltage is the technique I've heard of. It can definitely overcharge the battery so that makes sense.

_________________
2017 Ford Focus Electric (Magnetic)
2017 Ford C-Max Energi SE (Kona Blue)


Top
 Profile  
 
PostPosted: Sun Mar 18, 2018 12:46 pm 
Offline

Joined: Tue Aug 16, 2011 11:40 am
Posts: 924
Location: Toledo, Ohio
:evil: A little over 5 months and my 12V battery is dead again after being parked at the airport for a few days. To add insult to injury my 12V lithium jumpstarter was cold soaked and completely worthless at trying to start the FFE. Thankfully someone who wanted my parking spot had a beefy jumpstarter to get me started.

_________________
2014 Blue Candy FFE
http://www.fuelly.com/car/ford/focus/2014/triangles/303811 (since this forum doesn't allow BBcode in sigs)


Top
 Profile  
 
PostPosted: Sat Sep 29, 2018 7:19 am 
Offline

Joined: Sat Feb 03, 2018 8:59 am
Posts: 3
Any more updates on this problem? I'm starting to have the same issue with mine (which seems to be common) and I'm curious if Ford ever found a fix. When I tried to get the 12V replaced by Ford under warranty, they said it was previously replaced by the original owner (we bought it used) under warranty and wasn't eligible for a second warranty replacement.


Top
 Profile  
 
PostPosted: Sun Sep 30, 2018 1:55 pm 
Offline

Joined: Tue Aug 16, 2011 11:40 am
Posts: 924
Location: Toledo, Ohio
No updates. It's just a design flaw IMHO. It hasn't given me any problems since they replaced my RFA and TCU except the one time it randomly went dead and I needed a jumpstart. Carry a 12V jumpstarter and if you're lucky you'll get 3 years out of the 12V battery. If my problem comes back after warranty I'm likely installing a 12V disconnect.

_________________
2014 Blue Candy FFE
http://www.fuelly.com/car/ford/focus/2014/triangles/303811 (since this forum doesn't allow BBcode in sigs)


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 20 posts ]  Go to page Previous  1, 2

All times are UTC - 8 hours


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
© Ford Focus Electric Forum - part of the MyElectricCarForums.com Group