RECALL) KONA EV - BMS UPDATE and 20% Reduce cell capacity

Things haven't been happening that fast, especially in the southern hemisphere. It's well understood that after the BMS update (which has been around for at least 6 months) the GoM is down a bit until some new driving history has accumulated. This is all unrelated to the latest news.

 

Based on what? The GOM, or is your measured range now smaller? Does the car allow you to charge the battery to 100%?

 

I normally drive around at 11.3kw per 100 km. So my range was normally around 565 km at 100%.
After the service I charged the car to 100% and I got 470km range on the GOM.
I'd be happy if you guys have an explanation other than reduced batter access.
Yes it stated 100% once charged. I used my home charger.
No don't use any other S/W.

 

Kiwi, the service girl said this update has only just arrived, brand new. Hasn't been around for 6 months here.

 

The GOM is called a guess o meter for a reason, what you will need to do is see what you actual range is over time. Basically when they update the BMS, it resets the driving history so the GOM has no data to figure it out from.

 

Well I hope you're correct, shame the BMS cant access the data that is still stored in the car, which still shows the ave Kw per 100km over the life of the car so far.
Thanks for the replies guys, will report back on my next charge to confirm your thoughts.

 

The easiest way to get the battery as close to zero as possible, then recharge to 100% and measure how much electricity has been added.

If it is near 64kwh, then you know it is ok, if it is 52 or less (roughly), then you know it has been reduced by 20%

 

I don’t think the BMS upgrade will reduce the battery capacity. My car made in Mar 2020 and I bought in July 2020. I could not found the aux battery saver on/off option on my car control menu that means Hyundai had upgraded the BMS before I bought it. When I charged my car to 100% I can really drive 550km if use all battery energy.


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What we know as "Service Campaign 960" is dated 1 May 2020. There's been no other updates since.

 

How can you tell if an update is only partially applied?

 

The common symptom is that the "aux battery saver +" item no longer appears in the dash menu

 

565 km? That's like 350+ miles, how do you do that? You guys down under must just drive downhill. The 470 km sounds more realistic, that's 292 miles which coincidentally is exactly what mine charges to at 100%. That will go down substantially when the cold weather gets here, in the meantime anything over Hyundai's advertised 248 miles (400 km) I consider bonus.

 

If all your Driving is inside city you can get 600km range. I get 550 km range because my speed is around 70-90km/h no high way driving.


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Right, makes sense. Out in the sticks here, we use the highway to get most anywhere. Still about half the cost to drive than a fossil car.

 

This morning's briefing on Automotive News reported that Hyundai is considering a world-wide recall for the BMS.
My GOM showed 564 km at 100% last week and seems to be a good predicter of range. My driving pattern is similar to Maple's.

 

lol ... "Brothers" ..

 

If already discussed later in this thread, please ignore this observation:

My understanding is that any high power charging bypasses the on board charger as the on board charger is only good for 7.x kW of power.

 

Earlier in this thread, an extract from Wikipedia lists the fires in chronological order.

IIRC, I didn't see any dates that would be considered "cold winter time" (northern hemisphere).


Perhaps there is a temperature factor.

 

Post#20 in the "exploding Kona electric" thread includes a picture of a Kona in Finland that caught fire while charging. There was snow on the ground so it was cooler weather:

"A Kona burned in Finland earlier this year. It was plugged in at dealers yard. No details of any investigation results have been released.

This case is missing from the burn list."

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