BMS update fail...

Sounds like they don't know how to properly install the update. But they are giving you a new EV battery? That's a first.

 

I don't have the car back yet. I *assume* it is fixed (and SOC went from 17% to 18%, so maybe they did charge it a little bit). There is a 24kW Harley dealer a mile down the road - that will probably be my 1st stop, so I can verify charging functionality before I get too far down the road.

The service manager said they would put the thing on a charger for the weekend. According to BlueLink, it is not charging now, and the service department is closed on Sundays. So they managed to "meet" my expectations.

 

Car was put on the charger at 7:30 this morning. Up to 35% now, which is more than enough to get home. If they needed to stop the charge to open up a service bay, it wouldn't bug me at all. Plus, it clearly demonstrates that the BMS issue is fixed..

We will swing by at lunchtime to pick it up.

 

The dealer called and said the car was continuing to throw faults while charging. The codes that they could read suggested that one of the battery cells was out of spec. At the moment, we are waiting for Hyundai Tech to decide what to do, but I may be getting a new battery.

I would note that none of the scan tools that I tried are able to read fault codes from the BMS. I had run SoulEVSpy last Saturday, but didn't take a screenshot. I can look through the logs to see whether it recorded the cell voltages.

 

Heh. I can play back the log from Friday. There is indeed one cell out of spec.

 

To rename the thread, I think will need to get a mod to help. I will wait to see what Hyundai decides before I ask about that.

Hyundai wanted the dealer to inspect the charger that came with the car, which I very rarely use. So I brought it to them - mainly just so they can cross it off the list. Basically they were wondering if the fault was because of something wrong with the EVSE and not the car itself. But they can repro the problem with their charger.

I suspect that with the new BMS update, that it checks for cells that are out of spec before it lets you charge. From the way they talked, they sort of implied that this was the case, but I am not 100% sure. I wonder if a failed battery cell 6 months from now would also cause an inability to charge.

I would note that I didn't color that one cell red - that was SoulEVSpy that did that for me.

I haven't charged to 100% in months. I don't what effect a BMS balancing of the battery pack would have.

Perhaps one lesson here is that if you have TorquePro of SouEVSpy, you might want to check the cells before going in for a BMS update.