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Battery; 2016 C-Max Hybrid


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8 replies to this topic

#1 OFFLINE   Telerisk

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Posted 04 July 2018 - 10:24 AM

Is there away to Test the Health of the battery(s)?  2016 Ford C-Max; 5,500 Miles Purchase date 4/9/16

 

I am having concerns that the Batteries (Vehicle is NOT Plugin model....sure there is a better name)....seems battery is taking longer to charge and runs down more quickly.  I have actually been purposely driving it hard (keeping it out of EV) to get battery per symbol to get into the 80% range....but as I wrote, driving it normally to where EV is in use, Charge seem more quickly to get down into the 15% area.

 

Is there away to test the health of the battery(s)?  Can it be done by some method with car?  Only at dealership?  If battery(s) health was bad a Warning light would display on dashboard?   









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#2 OFFLINE   Plus 3 Golfer

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Posted 04 July 2018 - 12:30 PM

I assume you mean the High Voltage Battery.  Don't worry about the HVB health.  It should last the life of the car in the Hybrid C-Max.  You don't have to do anything special as the HVB is operated normally between about 40% State of Charge and 54% SOC.  The displayed battery symbol on the dash is not an accurate measurement of the actual SOC of the HVB.  Filling the battery symbol to the tip (appears to be 100% full) is acutally only about a 70% SOC. I've attached a conversion chart showing the actual SOC of the HVB with the displayed battery symbol. 

 

One only gets to the 70% SOC when going down long grades or braking from higher speeds.  The traction motor in the transmission simulates engine braking when coasting down hill by acting as a generator and using the kinetic energy to make electricity that is then sent to the HVB for storage.  Same thing happens when braking (non friction braking).  This is generally referred to as "regeneration" or "regenerative braking".  So, you should be able to get the symbol to approach the tip if slowing to a stop going down a longer hill.

 

As you can see from the chart, your 15% is actually about a 32% SOC and your 80% is actually about a 57% SOC -- pretty normal.  More than likely, the 15% is after running in EV+ mode and the 80% is when cruising at higher speed for a period of time on fairly flat roads or after regenerative braking.

 

There are many Diagnostic Trouble Codes for the HVB and hybrid operations.  Since, you have no DTCs, everything should be fine.  Has your fuel economy changed?  If your SOC seems to be declining more rapidly than before, perhaps you are making better use of the EV capability or you have more electrical load to supply like: running the A/C, seat heaters, and so forth.
 

 

gallery_167_32_27870.png


Edited by Plus 3 Golfer, 04 July 2018 - 06:41 PM.

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#3 OFFLINE   Telerisk

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Posted 04 July 2018 - 12:54 PM

Thank you.....

 

If, the health of the High Voltage battery(s) were to be getting bad, I would only know that if I Gas Mileage was decreasing?  Your detailed explanation educated me, this add'l question is....other than poor Gas Mileage, is there anything within the Vehicles computerized system that would display alerting me to get the battery(s) Checked?   The change that I have noticed is the symbol....as I wrote, it used to run lets say (using the symbol)  35% to 80% and now its normal is 15% to 60%.......



#4 OFFLINE   Plus 3 Golfer

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Posted 04 July 2018 - 07:15 PM

One can record real time hybrid operating data with the FORScan App.  But without historical data to compare, it would be difficult to determine how any changes would affect operations.  One will lose HVB energy storage capacity over operating time / miles but I am not aware of anyone where such loss affected hybrid operation / fuel economy. 

 

Read this thread and follow the link to the INL test results of 4 C-Max hybrids.  Although the HVBs have lost some storage capacity.  FE appears to not be affected by the lost capacity.

 

Other than DTC and perhaps messages being displayed, I'm not aware of anything that you can readily look at with respect to the HVB health.


Edited by Plus 3 Golfer, 04 July 2018 - 07:16 PM.


#5 OFFLINE   Telerisk

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Posted 05 July 2018 - 09:17 AM

"Other than DTC and perhaps messages being displayed, I'm not aware of anything that you can readily look at with respect to the HVB health."

 

This line caught my attention...and may be the answer I am looking for to settle my concerns regarding the battery(S). 

 

1) Do not know what DTC means?    

2) "Messages displayed".....An alert will display in the Instrument Panel if the Battery(s) need attention\not charging properly\defective?  It would make sense that such an alert would be programmed\designed into the electronics of thew C-Max given the Importance of the Battery(s) to the performance of the vehicle.  I am just trying to find out if something is starting to, or is going badly as to the battery(s) I don't need to wonder...as, an Alert will display advising me to seek Service for the Battery(s).   



#6 OFFLINE   Plus 3 Golfer

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Posted 05 July 2018 - 12:09 PM

DTC = diagnostic trouble code stored in a control module which will illuminate the check engine light.  Your guess is as good as mine if a message will be displayed for all HVB DTCs.  If there is a major issue with the hybrid operation, there will likely be a message like "Pull over Safely Now" if you are driving the car or the car will not start..

 

There is nothiing that you can do proactively.  


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#7 OFFLINE   ptjones

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Posted 06 July 2018 - 08:53 AM

The bottom line is I have 201k miles on MADMAX with 52% EV and I'm getting better gas mileage than I did when it was new.  It looks like the HVB will last longer than the car, I am unaware of anyone replacing a HVB. :)

 

Paul


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#8 OFFLINE   mysterymeat

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Posted 12 July 2018 - 05:54 PM

Good evening PT,

 

I've watched some of your videos and have found them to be very informative. With a little luck I might pull off my first 700 miler.

 

I was wondering if you've tried non low rolling resistance tires or a slightly larger size?

 

Thanks, Greg



#9 OFFLINE   ptjones

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Posted 16 July 2018 - 05:11 PM

Good evening PT,

 

I've watched some of your videos and have found them to be very informative. With a little luck I might pull off my first 700 miler. :)

 

I was wondering if you've tried non low rolling resistance tires or a slightly larger size? I looked at it, but I didn't like the clearance issues, I like 50 psi. instead. :) 

 

Thanks, Greg

Paul








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