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Guest Message by DevFuse

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Register your Fusion Hybrid at the official Ford authorized registry here.


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parked 3-4 days hv battery discharges ??


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29 replies to this topic

#21 OFFLINE   corncobs

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Posted 02 October 2013 - 07:59 PM

My main big battery does not hold a charge. It can be almost fully charged at night and the next morning its way low. Bad battery possibly? It seems when I am in EV mode it drains pretty rapidly but I don't have anything to compare it to.


I totally agree with GrySql that doesn't sound right at all.

For me my HVB SOC is usually slightly higher in morning than when a shut it off the night before. In afternoon when leaving work the SOC is quite a bit higher it seems the HVB "relaxes" a bit remembering the true SOC while waiting for me to finish work.

How is your 12V battery? Maybe the HVB relay is not getting disconnected after shut down and now draining the HVB.
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#22 OFFLINE   hybridbear

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Posted 03 October 2013 - 03:45 PM

My main big battery does not hold a charge. It can be almost fully charged at night and the next morning its way low. Bad battery possibly? It seems when I am in EV mode it drains pretty rapidly but I don't have anything to compare it to.

The SOC shouldn't really change while the car is off as it is disconnected. It's possible that your battery is within the parameters of the computer so it doesn't throw a code, but that doesn't mean that it's performing at an optimal level.


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#23 OFFLINE   acdii

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Posted 07 October 2013 - 08:13 PM

My main big battery does not hold a charge. It can be almost fully charged at night and the next morning its way low. Bad battery possibly? It seems when I am in EV mode it drains pretty rapidly but I don't have anything to compare it to.

Take a picture when you shut it down, and one when you start it up, print them out, date them and do this a few times. Then take it to the dealer with photographic proof. If you still have issues, then escalate. That does not sound right at all.

 

Once disconnected there should be no bleed down, in fact, just like CC mentioned, when the batteries cool down and the excitement stops, the SOC usually goes up.  I can take my Lipo packs, run my plane, and drain them down to about 3.5 v per cell, let them cool and when I check them later on they have gained about .2 v per cell back.  I flew a couple weeks back and I know I drained 2 packs down to 3.4, thats where I set my cutoff alarm. I didnt charge them right away, so they sat, this past weekend I put them on the charger and they both recovered to 3.7v per cell.


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#24 OFFLINE   B25Nut

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Posted 07 October 2013 - 10:29 PM

I just left my FFH in the long term parking at our airport for seven days.  I left it with a 80%+ HVB SOC.  When I started it up this afternoon, it was at 95%+.


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#25 OFFLINE   acdii

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Posted 08 October 2013 - 11:08 AM

I just left my FFH in the long term parking at our airport for seven days.  I left it with a 80%+ HVB SOC.  When I started it up this afternoon, it was at 95%+.

Welcome back!

 

It was a pleasure meeting you and the wife the other day, and I extremely appreciate the gift. :)  It was great that you got to meet Mike and Chris, as you can tell Mike loves talking about warbirds.  Keep me updated on that project you have going too, will be interesting to see it "take off". 


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#26 OFFLINE   corncobs

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Posted 08 October 2013 - 12:44 PM

I remembered to take a pic this morning and just now before getting some lunch. The pic shows the displayed SOC difference after resting for 4.5 hours on the right this morning and on the left just now.

SOC_zps52ac8155.png
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#27 OFFLINE   hybridbear

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Posted 09 October 2013 - 09:13 AM

I remembered to take a pic this morning and just now before getting some lunch. The pic shows the displayed SOC difference after resting for 4.5 hours on the right this morning and on the left just now.

Very interesting! Could be temperature related. The HVB warms up quickly when driving and then cools down overnight. When it cools off overnight it could cause of jump in SOC on the display.


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#28 OFFLINE   acdii

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Posted 11 October 2013 - 03:16 PM

Very interesting! Could be temperature related. The HVB warms up quickly when driving and then cools down overnight. When it cools off overnight it could cause of jump in SOC on the display.

thats part of it. When at rest the Lion battery also regenerates slightly. However, and I noticed this with the Lipo, the voltage rises, but the current capacity doesn't.   Capacity is measured under load, voltage at rest. So what you see is most likely the rise in the pack voltage from resting and not really anything else. It probably will drop slightly faster when used than after a fresh recharge. 


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#29 OFFLINE   corncobs

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Posted 11 October 2013 - 06:53 PM

thats part of it. When at rest the Lion battery also regenerates slightly. However, and I noticed this with the Lipo, the voltage rises, but the current capacity doesn't.   Capacity is measured under load, voltage at rest. So what you see is most likely the rise in the pack voltage from resting and not really anything else. It probably will drop slightly faster when used than after a fresh recharge. 

You are absolutely correct about dropping faster and like you said its higher voltage not more energy (capacity).
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#30 OFFLINE   DrDeke

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Posted 09 November 2015 - 04:04 PM

OP: Did you ever get this fixed or figured out?






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