Jump to content

Custom Search




Welcome to the C-MAX Hybrid Forum


Sign In  Log in with Facebook

Create Account
Welcome to the C-MAX Hybrid Forum. You must register to create topics or post in our community, but don't worry this is a simple free process that requires minimal information for you to signup. Here's some member benefits:
  • Start new topics and reply to others
  • Subscribe to topics and forums to get email updates
  • Get your own profile page and make new friends
  • Send personal messages to other members
  • Create photo albums and post images. . .more!
Click here to create an account now
 
Guest Message by DevFuse

Get you C-MAX Hybrid Registered in the official Ford Authorized Registry. More here.


Photo

Leaking LV battery?


  • Please log in to reply
17 replies to this topic

#1 OFFLINE   SPL Tech

SPL Tech

    C-Max Hybrid Member

  • C-MAX Hybrid Member
  • 286 posts
  • Region:Decline
  • Locationhome
  • My C-MAX's Year:Decline
  • Current Vehicle:c-max 2013 SL

Posted 18 January 2015 - 01:36 AM

We just picked up our second CMAX, a SEL, The first is an SL. Anyway, I opened the back to notice a pool of acid in the battery container that the LV battery sits in. I pulled the battery and thoroughly rinsed  the acid out with water and baking soda, and I did the same to the battery. But the big question is how did the acid get there in the first place? I placed the battery on a piece of paper after I dried it off and found it was not leaking. I held it upside down and also found it was not leaking. There was nothing apparently wrong with the battery other than that it had a red eye even though I just drove the vehicle an hour prior.

Anyway, our SL LV battery looks perfectly fine. Zero leaks whatsoever. I am thinking that the acid came out of the exhaust port. There are only two things I can think of. 1: the battery was overfilled at the factory. 2: the charge voltage is too high which is causing the acid to boil and leak out of the port hole. This can happen above 15v on some batteries.

I also noticed that the exhaust port on my SEL is different than the one on the SE. On the SE there is a tube that exits the battery box and runs about 5" below the box. Same with the tube on the HV battery. But on my SLI there is no such tube. There is a rubber extension that sticks out of the battery box for about 1" and that is all.
 

Also, the LV battery is not sealed FYI. It's just a normal lead acid battery with a directed exhaust port, but it is not sealed. There are caps on top you can open to fill the battery with. I cant believe Ford went with a non-sealed battery inside the vehicle. That is ridiculous and unsafe. They should have gone with AGM tech with internal hydrogen filters like Optima does.


Edited by SPL Tech, 18 January 2015 - 01:42 AM.








Lose this advertisement by becoming a member. Click here to create a free account.


#2 OFFLINE   fotomoto

fotomoto

    C-Max Hybrid Member

  • C-MAX Hybrid Member
  • 1,298 posts
  • Region:Decline
  • LocationSouth Texas
  • Current Vehicle:C-Max SEL

Posted 18 January 2015 - 09:30 AM

A couple of housekeeping items:   There isn't an SL in the CMax line; just SE and SEL.   Since you have SL listed as your current vehicle, I thought I should point this out.   Second, the LV acronym isn't commonly used in hybrid forums for the 12v battery like HV is used for the high voltage battery.  Best to stick with 12v for better understanding.

 

Thoughts on the 12v battery:  Did you buy the SEL new?  The most commons reasons for leakage is overcharging or a leaking case. Sounds like you've pretty much ruled out the latter.

 

Welcome to the dual owners club!   :happy feet:        There are a few of us around.


Edited by fotomoto, 18 January 2015 - 09:33 AM.


#3 OFFLINE   hybridbear

hybridbear

    C-Max Hybrid Member

  • C-MAX Hybrid Platinum Member
  • 494 posts
  • Region:Decline
  • LocationMinneapolis
  • My C-MAX's Year:Decline
  • Current Vehicle:2013 Fusion Energi Titanium, 2013 Focus Electric, my parents have a C-Max Energi

Posted 18 January 2015 - 01:36 PM

What's wrong with this type of battery inside the car? Why is it "ridiculous"?

#4 OFFLINE   rjam

rjam

    C-Max Hybrid Member

  • C-MAX Hybrid Member
  • 196 posts
  • Region:U.S. Pacific Coast
  • LocationUsa
  • My C-MAX's Year:2015
  • Current Vehicle:CMAX SEL

Posted 18 January 2015 - 05:27 PM

Hi
Did not think ford used this type battery. This quote is from owners manual.
Your vehicle is equipped with a Motorcraft® maintenance-free battery which normally does not require additional water during its life of service.

#5 OFFLINE   SPL Tech

SPL Tech

    C-Max Hybrid Member

  • C-MAX Hybrid Member
  • 286 posts
  • Region:Decline
  • Locationhome
  • My C-MAX's Year:Decline
  • Current Vehicle:c-max 2013 SL

Posted 18 January 2015 - 11:23 PM

Sorry, SE and SEL. I get the letters mixed up sometimes. Anyway, I did not buy the car new. I just got it. It's a 2013 with 29k miles. It was used as a rental before I bought it. I checked ETM voltage, and it said 12.6v with the car in standby and 14.5-6 in ready. That's about what my SE runs at, and I would not consider 14.6 to be an overcharge.

To the last poster: the vehicle is equipped with a Motercraft "maintenance free" battery and it is quite likely it does not normally require water. But the battery is not sealed, and there are ports to open to put water in if needed. Also "maintenance free" is a marketing term really as no battery is completely maintenance free. At the minimal you should check the terminals for corrosion buildup once every while. I noticed a very small amount on my battery.

I say the lack of a non-sealed battery is ridiculous because look at the problem I am having—I had a pool of sulfuric acid in my trunk. I am glad I caught it in time before it ate through the screws that hold the battery in place, and then started leaking down onto the suspension and chassis.

Batteries contain sulfuric acid, which is extremely corrosive and poisoness. charging batteries produces hydrogen which is also toxic and extremely explosive. Does that sound like the type of stuff you want inside the cabin with you? Ford is trying to tame these problems by using external venting and a battery box to isolate any leaking fluid. But the problem is if one of those things fail, you have a big problem which could harm someone. Going with a truly sealed battery would completely eliminate all of those risks for a fairly modest increase in price (FYI MSRP on the replacement battery for the CMAX is actually more than MSRP on an AGM sealed battery...)

I dont know of a single automotive battery manufacturer that would ever say it is okay to put a battery inside a vehicle, unless it was a sealed AGM battery.

 

Anyway, all I can do is let it sit and see if the problem comes up again. If it doesent, I guess the rental guys did something retarded. probably overcharged it.



#6 OFFLINE   SPL Tech

SPL Tech

    C-Max Hybrid Member

  • C-MAX Hybrid Member
  • 286 posts
  • Region:Decline
  • Locationhome
  • My C-MAX's Year:Decline
  • Current Vehicle:c-max 2013 SL

Posted 18 January 2015 - 11:26 PM

All in all, sulfuric acid is extremely nasty stuff and it will completely destroy anything other than a few types of plastic. It's really not something you want leaking around in your car. There is an old Navy submarine that sunk because of leaking batteries. The acid caused a hull breach, and I think the entire crew died if I recall right. The submarine was even in port too!


Edited by SPL Tech, 18 January 2015 - 11:31 PM.


#7 OFFLINE   fbov

fbov

    C-Max Hybrid Member

  • C-MAX Hybrid Platinum Member
  • 1,431 posts
  • Region:U.S. Northeast
  • LocationRochester, NY
  • My C-MAX's Year:2013
  • Current Vehicle:C-Max Hybrid

Posted 26 January 2015 - 05:40 PM

Wholely off topic, but... I bet you're thinking of the F-4.

"A Navy investigating board later attributed the accident to the corrosion of rivets in the lead lining of a ballast tank, most likely caused by sulfuric acid. This corrosion permitted seawater to seep into the battery compartment. "

 

HAve fun,

Frank



#8 OFFLINE   vitmas

vitmas

    New Member

  • C-MAX Hybrid Member
  • 4 posts
  • Region:European Union
  • Locationvno
  • My C-MAX's Year:2014
  • Current Vehicle:volvo, ford, opel

Posted 31 August 2018 - 01:22 PM

Hello,

 

I have won car on copart auction and it has just arrived. When I opened trunk lid I found 12V battery is dead - it has only 6V. But most interesting that all around it where's like green gel/liquid? What could be that, is my battery leaking?

 

And second question: in our region it's not possible to get OEM Motorcraft BXT-67R. Can I use any lead acid 12V 400A cold start battery that fits size? I cannot find actual specification of this battery. 

 

Thank you.


Edited by vitmas, 31 August 2018 - 01:25 PM.


#9 OFFLINE   homestead

homestead

    C-Max Hybrid Member

  • C-MAX Hybrid Member
  • 500 posts
  • Region:Decline
  • LocationPacific Northwest
  • Current Vehicle:C-Max Hybrid SEL

Posted 31 August 2018 - 02:02 PM

Is this car a hybrid?



#10 OFFLINE   vitmas

vitmas

    New Member

  • C-MAX Hybrid Member
  • 4 posts
  • Region:European Union
  • Locationvno
  • My C-MAX's Year:2014
  • Current Vehicle:volvo, ford, opel

Posted 31 August 2018 - 02:23 PM

yes, energi actually 



#11 OFFLINE   homestead

homestead

    C-Max Hybrid Member

  • C-MAX Hybrid Member
  • 500 posts
  • Region:Decline
  • LocationPacific Northwest
  • Current Vehicle:C-Max Hybrid SEL

Posted 31 August 2018 - 03:54 PM

Yeah find an equivalent physical/electrical sized 12v battery and put in there.  Maybe the case of the old battery is cracked.

There is a battery reset that should be done also to tell the car that a new battery was installed.  Ford dealer can do that.

There is also an energi forum, this one is mostly for hybrids.

Good Luck!



#12 OFFLINE   jmcgliss

jmcgliss

    New Member

  • C-MAX Hybrid Member
  • 43 posts
  • Region:U.S. Great Lakes
  • LocationChicagoland
  • My C-MAX's Year:2018
  • Current Vehicle:2018 C-Max SE

Posted 01 September 2018 - 08:40 PM

I thought some German cars have 12v batteries under the back seat. It's not unheard of to find them in the cabin.



#13 OFFLINE   Plus 3 Golfer

Plus 3 Golfer

    C-Max Hybrid Member

  • C-MAX Hybrid Member
  • 2,034 posts
  • Region:Decline
  • Location"Valley of the Sun" - AZ
  • My C-MAX's Year:2013
  • Current Vehicle:2013

Posted 01 September 2018 - 09:04 PM

BXT-67R specs are 390 CCA and 65 minutes reserve capacity.  Find a battery that is close to the 65 minutes reserve capacity as that is an indication of storage capacity.  The Battery Monitoring System uses storage capacity of a new 67R and computes losses in capacity as it ages in its algorithms including state of charge calculation.  As stated in previous post, you should reset the BMS when a new battery is installed.  You can reset it with the free Windows version of ForScan.


Edited by Plus 3 Golfer, 02 September 2018 - 03:20 PM.


#14 OFFLINE   vitmas

vitmas

    New Member

  • C-MAX Hybrid Member
  • 4 posts
  • Region:European Union
  • Locationvno
  • My C-MAX's Year:2014
  • Current Vehicle:volvo, ford, opel

Posted 02 September 2018 - 11:21 PM

Thank you for your answers. Yes, I put Bosch 12V battery and everything seems to be ok. Only cannot find out what could be this green gel inside battery compartment i found:

30kgiyo.jpg


Edited by vitmas, 02 September 2018 - 11:22 PM.


#15 OFFLINE   jestevens

jestevens

    C-Max Hybrid Member

  • C-MAX Hybrid Member
  • 286 posts
  • Region:U.S. Northeast
  • LocationPennsylvania
  • My C-MAX's Year:2013
  • Current Vehicle:C-MAX SEL Hybrid

Posted 04 September 2018 - 05:50 AM

In reply to original post it would seem to me that the vent tube for the 12V battery was missing or disconnected, hence the acid in the compartment?


Edited by jestevens, 04 September 2018 - 05:53 AM.


#16 OFFLINE   jestevens

jestevens

    C-Max Hybrid Member

  • C-MAX Hybrid Member
  • 286 posts
  • Region:U.S. Northeast
  • LocationPennsylvania
  • My C-MAX's Year:2013
  • Current Vehicle:C-MAX SEL Hybrid

Posted 05 September 2018 - 05:31 AM

If I remember right the Prius had a gel battery, to help contain spreading of electrolyte in the event of a leak, I don't know the design of the motorcraft battery but maybe it is the same? 



#17 OFFLINE   raadsel

raadsel

    C-Max Hybrid Member

  • C-MAX Hybrid Member
  • 633 posts
  • Region:U.S. Mountain
  • LocationHouston, TX
  • My C-MAX's Year:2013
  • Current Vehicle:C-Max SEL

Posted 05 September 2018 - 08:44 AM

If I remember right the Prius had a gel battery, to help contain spreading of electrolyte in the event of a leak, I don't know the design of the motorcraft battery but maybe it is the same? 

 

Cars with lithium batteries should be Lithium Polymer (LiPo), not Lithium Ion (LIon or Li-ion). The LiPo battery is the gel type of battery; it is used not only because it is less likely to spread, if it leaks, but also because it is more "stable" -- it is less likely to "explode"/spontaneously combust.



#18 OFFLINE   vitmas

vitmas

    New Member

  • C-MAX Hybrid Member
  • 4 posts
  • Region:European Union
  • Locationvno
  • My C-MAX's Year:2014
  • Current Vehicle:volvo, ford, opel

Posted 06 September 2018 - 12:54 AM

Cars with lithium batteries should be Lithium Polymer (LiPo), not Lithium Ion (LIon or Li-ion). The LiPo battery is the gel type of battery; it is used not only because it is less likely to spread, if it leaks, but also because it is more "stable" -- it is less likely to "explode"/spontaneously combust.

 

This gel is not from 12V battery. Do you think it can be from main HVB battery?...








Custom Search




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users

Privacy Policy TERMS OF SERVICE ·