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Discussion Starter · #1 ·
I wonder if my OBCM is going bad. My charger (Clipper 220V) does not shut down when battery if fully charged. I did a hard re-set on the car and unplugged the Clipper charger a few times. Im concerned this is doing harm to the HV battery... Any thoughts?
Thanks
 

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You most likely have a bad module in the hv battery. The charger keeps trying to balance the modules after theyre fully charged. When one module wont reach full capacity where the others are the charger keeps trying. When a battery is unbalanced, the charger may run for days. Its not doing much currentwise nor is it harming the battery, it just continues to try to top off the module thats not fully charged. A scan tool will reveal the culprit. Id get it over to Harleyguy.
 

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I believe we have emailed back and forth but Joe is correct you can have one or more modules that are causing this problem. Also note I've replaced modules and the charger turns off and also replaced modules and the charger hasn't turned off .
On a repair note when we replace a module we have a pretty good idea which ones are bad at that moment by checking live data and for codes . I've learned a few things the hard way since I started doing battery repairs and I think Joe would agree not one Karma is like another when it comes to battery faults .

Just when I think I've got a handle on them a car comes in with another battery fault I've never seen . I had a Karma in the shop for three days trying to come up with a game plan for the owner . With four bad modules and three of the modules having fault codes I've never seen I decide it was in the best interest of my dealership and owner not to repair this battery .

I'm going to try and build another battery for the customer and swap out his defective one this will be a spare time adventure . This car has had a battery problem since he bought it from the original owner who insisted he never had a battery issue but that's another story .

A123 had or still have some test equipment that Fisker is trying to get from A123 for dealerships like myself and Joe can use to help determine battery problems before we go though the work of removing the battery and attempting a repair .
 

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I wonder if my OBCM is going bad. My charger (Clipper 220V) does not shut down when battery if fully charged. I did a hard re-set on the car and unplugged the Clipper charger a few times. Im concerned this is doing harm to the HV battery... Any thoughts?
Thanks
If the car is charging to 50 miles and you don't have a check engine light on after you charge the battery at some point the module or modules will set the check engine light . Run the battery down to 10 miles and watch if the mileage to zero drops off really fast . Sometimes it also starts to drop off at 14 if it drops down really fast that is a good indication of a bad cell or cells going bad in the module.
After running down to zero if the battery isn't happy the check engine light will come on . Drive the car and post what happens or feel free to contact me .
 

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Discussion Starter · #5 ·
Adam:
I did a long hard boot. Unplugged cable overnight. Next day, I charged battery and it gave no fault reading and no CEL. It seems to be working normally now. These cars are VERY quirky.. but I still love it. Thanks for your help.
 
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