Charging doesn't stop when car fully charged

[rbort]

 

 

I have already mentioned the MFM Web site FAQs that state two reasons why the car overrides the Value Charge Profile and charges the HVB immediately after plugging the car into the charger:  low SOC and low HVB temperature.  You have already seen two examples starting with this post http://www.fordfusio...or-hvb/?p=21630 where there are 5.5 hours of lower cost value charge windows to complete two hours of charging, yet the car charges immediately when I plug it in during the highest cost charge window. 

 

I put my explanation in that thread and a suggestion for you to test out.  Let me know how that works out for you.

 

-=>Raja.

[rbort]

By the way...

 

 

 

I have already mentioned the MFM Web site FAQs that state two reasons why the car overrides the Value Charge Profile and charges the HVB immediately after plugging the car into the charger:  low SOC and low HVB temperature.

 

Low HVB temperature is out, its not winter its summer now, so that's not it.

Low HVB voltage, that could be, but may very well be reserved for the fact that if one of the cells crashed and went too low compared to the others it will charge that cell right away (well charge all but drain higher voltage cells to balance the pack) to prevent further damage to the cell.    That's what I would do if I was writing the code for it.

 

You may see the 2nd phenomenon most likely at below 1/2 of a hybrid battery where the cells tend to start straying more and more away from each other as worse cells drop voltage faster than better condition ones.

 

-=>Raja.

Edited June 20, 2015 at 02:28 AM by rbort

[Marc]

I find this particularly annoying as my company had chargepoint chargers installed at the office and charge .60/hr of charging rather than by the KWH. I accidentally left it there for 4 hours and got charged for all 4 hours instead of having it turn off after 2 hours when it was done charging... Electric was more expensive than gas that day...

[Hokyfan]

Well - I've read all your posts - thanks to all.

 

I do a lot of driving and having the L2 charger allows me to minimize gas by charging 2 to 4 times a day.  

 

What I'm getting from your posts is that the car continues in the 'charging' state for the purpose of cooling the HV batteries, as well as the charging the 12V battery when needed.  Seems reasonable.  Would be nice if the service department at the dealership would explain that rather then just saying "There is nothing wrong with your car!!!"

[murphy]

The service department at your dealer probably has no clue how your car works.

[cwstnsko]

I find this particularly annoying as my company had chargepoint chargers installed at the office and charge .60/hr of charging rather than by the KWH. I accidentally left it there for 4 hours and got charged for all 4 hours instead of having it turn off after 2 hours when it was done charging... Electric was more expensive than gas that day...

My experience with Chargepoint has been that if there is an hourly fee, it applies to the entire time you are plugged in, not just the time spent actively charging the HVB.

 

AKAIK, Every plug-in that has some form of active TMS for the battery, will continue to use some "shore power" even when not charging the HVB, when plugged in.

[jeff_h]

My experience with Chargepoint has been that if there is an hourly fee, it applies to the entire time you are plugged in, not just the time spent actively charging the HVB.

 

I talked with a Chagepoint sales rep early last year when researching maybe getting one at my company's building (sadly, the company said no), and part of the details that the sales rep told me was that charges by hour or by kWh (or no charge at all) was all set by the station manager at the property location.  There were also group settings that could be established to make charging free for a select group (such as employees) and a certain cost per hour or kWh for others (such as public non-employees).  So if my company did get one installed, I would have likely been the station manager and would have set the rates according to what my company's management wanted them to be.

Edited August 29, 2015 at 07:32 PM by jeff_h

[cwstnsko]

I talked with a Chagepoint sales rep early last year when researching maybe getting one at my company's building (sadly, the company said no), and part of the details that the sales rep told me was that charges by hour or by kWh (or no charge at all) was all set by the station manager at the property location.  There were also group settings that could be established to make charging free for a select group (such as employees) and a certain cost per hour or kWh for others (such as public non-employees).  So if my company did get one installed, I would have likely been the station manager and would have set the rates according to what my company's management wanted them to be.

This is consistent with my experience also, I just don't think there are Chargepoint installations where an hourly fee is involved that only charge for the time that current is flowing. My experience is that the time aspect of the fee runs from plug to unplug, regardless of the amount of energy being used. At most installations, Chargepoint notifies me through the app and text when the charge current starts to taper off, so I can go unplug, move my car, avoid excess fees and free up the station for others.