[HKtech]

Did you link bluelink to any 3rd party hogging electric grid providers, insurance companies ( using obd2 dongle), companies that collect data on battery SOH degradation?
Do you use smart watch app or other means that use Bluelink app to sync with bluelink?

 

[HKtech]

I don't think I knowingly signed up for a 3rd party app integration with Bluelink.

Stationary maintenance if 12V battery is in good shape will kick in whenever 12V battery drops below 12.6 V.
And if you have Hyundai GDS tool it will keep 12V battery at 92% SOC ( 1% +/-).
Just make sure that BM2 negative wire is attached to the chassis and not directly on the 12v battery negative terminal.

 

[HKtech]

In theory it removes the BM2's tiny current draw and capacitance from influencing the current shunt attached to the 12V battery negative lead. Only the battery itself should be assessed by the small microcontroller installed inside the plastic surrounding the shunt and using a chassis ground for the BM2 ensures that's the case.

Whether it's an issue or not, it's easy enough to attach the BM2's negative connection elsewhere as shown in this photo.

View attachment 54161

View attachment 54162

Thank you for providing pictures and how negative terminal can be attached, without using 12V - negative terminal.
You can also install this device away from under the hood. For as long you have live circuit when stationary.
There may be slight differences between voltages but this can be easily observed and compensated when reading app values.

 

[HKtech]

You can disable app

 

[HKtech]

It is recommended to avoid using widgets and smartwatches, especially those that continuously refresh in the background.

Additionally, any third-party integrations that utilize BlueLink to collect information should be avoided.

If the dealership salesperson has initially set up the BlueLink app for the owner, it is crucial for the owner to change the password as soon as possible.

 

[HKtech]

He's explained this already, elsewhere. It's so the tiny current draw of the BM2 (a few milliamps) then flows through the current-sensing widget attached to Earth-terminal of the car, so this extra current is then detected & accounted for by the chippery & data-logging that goes on.

Connecting directly across the terminals means there's effectively a tiny internal leak inside the battery, which this widget can't detect or account for. Which for all I know might mean the widget/car thinks the battery is defective when actually it's fine!

There is another important thing that smart sensor on negative terminal is checking. It is 12V battery internall resistance, and if this aftermarket solution is hooked over 12V negative terminal it will interfere with reading necessary to make accurate decisions on charging logic.

 

[HKtech]

@stressless-1
Please note that I do not rely on the internet for my knowledge of the E-GMP platform. I would appreciate it if you could conduct more research before questioning my posts in the future. Furthermore, you have already identified the reason why the BM2 must be wired differently than what is stated in the user manual.

 

[HKtech]

Once a 12V battery's voltage decreases to single digits, it has already incurred irreparable harm to its State of Health (SOH). This damage will only deteriorate over time.
More frequent maintenance and monitoring will be required if not replaced.

 

[HKtech]

@stressless-1

The onboard VCU is used to assess the health of the 12V battery.
For an accurate assessment, it is crucial to avoid jump-starting the vehicle, despite any challenges faced by the tow operator. This ensures that the service department can effectively assess, document, observe, and report the issue to the warranty claim department.
Additionally, capturing videos using a multimeter and providing precise voltage information serves as valuable evidence to support warranty claims by owner reporting to the service center.
This way, the service department has more evidence to provide for warranty claims, leading to faster resolution and approval, and eliminating false positives about the 12V battery reading still being good when in reality it is exhausted down to single-digit voltage.

 

[HKtech]

In the event that the operator requires a jump start, they should be advised to use a temporary 12V battery to start the vehicle. This process involves removing the terminals from the vehicle's battery, ensuring that the affected vehicle battery remains intact and the terminals of the 12V battery are also disconnected.
By following this procedure, the assessment process will be simplified for both the owner and the service department, facilitating a valid warranty claim for 12V battery replacement, if necessary.