Kona Electric 12V Auxillary battery Issues?

You need a new battery. It sounds like it was damaged during the updating process as perhaps they took too much time.

 

I thought in some of the update docs it says to hook the 12v up before the update so it doesn't die. Maybe they omitted that step and it got too low due to that.

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On the latest update it says to leave the car in Run mode for some time, I think 30 min or so, to ensure it's charged up. It seems the updates are done with the car in a state where the 12V battery is running the electronics and so they have to be done promptly. My 12V battery is still perfect and my fear is that my dealer will damage it because they would not have had much practice due to the few Konas in the area. Worst still, I need all the BMS updates, not just the latest.

Frankly if this happened to me and I got the dealer runaround, I'd just purchase a new battery myself rather than have them waste my time.

 

That's an interesting thought! Would a EV be relying on the 12V whilst in the garage? Would the car be switched off/on more often, and I say that because I think the biggest challenge for an EV is when the car is powered up again.

 

The 12V battery is constantly in use even when the car is off, though the draw is supposed to be minimal. This keeps the very basic vehicle functions alive, such as the timers, listening for the keyfob signal, and some battery monitoring functions IIRC.

The car is supposed to monitor the 12V battery SOC and use the main traction battery to recharge it periodically, even if not plugged in. When this happens you will notice a yellow-green light in the front emblem; this light means the high voltage system is active, and it's using the main battery to recharge the 12V accessory battery.

 

Yea, that was what I thought was supposed to happen as well (Genevamech). Mine is parked some weeks for 4-5 days at a time before using it & I only charge about once per month.... Knock on wood - I haven't had any dead battery issue YET.

 

Wouldn't it be a NICE feature to have the status (voltage) of the BATTERY in BLUELINK ????? In the "VEHICLE STATUS" display ... Might have to go to the PLAY STORE and contact the developers with that suggestion.

 

Even if your battery wasn't bad to begin with, discharging it to 6.4vdc will cut it's life substantially. Twice probably has done it in. Lead acid batteries cannot be discharged below 50% without damage. Even when they charged it up, it may hold the charge temporarily. I'm wondering if they really did a cold cranking amp test. I would check the current draw from the battery with a current meter to see what the draw down is. Really up to the dealer to do this troubleshooting. Sounds like there might be something stuck on.

 

No. 1 is very likely, No. 2 seems implausible.

 

I bought mine in March 2019 as well and I did not get any of these recalls. Should I be concerned?

 

The water pump was for a specific range of dates. There was one concerning a HV fuse but not sure of date range. You should definitely have had the BMS ones. Maybe contact Hyundai in your country and ask them to check against your VIN

 

Thanks. I did get the BMS one, but not the others.

 

Why the heck are dealer-schlumps *not* putting chargers on these 12V batteries while doing reflashes??
Like, duh.

_H*

 

You should put your VIN number in the recall search page. Hyundai has one and National Transportation Safety Board (NTSB) has a page too. Go to www.nhtsa.gov/recalls and enter your vin. You should find your car in the recall. Take that information and call your dealer and schedule the recall.