[TurtleBoy]

Originally Posted by VINCER0

Alright congratulations, all you've done was show that you like to cherry pick one sentence and ignore everything else that was written. Great job on that. Gold star level. And who is this "we" you keep referring yourself as...do you have multiple personalities or something?

But since you have it all figured out, explain to me why my car and other people's 12V AGM is reading at 13-14+V after a day of not charging or driving?

We can go on like this all day if you want, just makes you looks worse. All I asked is if you had docs backing up your statement, perhaps just say no rather than all of your nonsense.

[VINCER0]

Originally Posted by TurtleBoy

We can go on like this all day if you want, just makes you looks worse. All I asked is if you had docs backing up your statement, perhaps just say no rather than all of your nonsense.

See the thing is, I provided the documents that backed up my statements and observations. You're the one singularly obsessed with a sentence you misunderstood and took out of context.

Unlike some, I actually have a life (as post counts can show), so I don't have the desire or the time to "go on like this all day" like you want.

And I see the one deflecting is you because you still can't explain why my and other's car's 12V AGM is showing a reading of 13-14V after a day of not charging or driving.

The answer is; the 48V Lithium is charging the 12V AGM as per SIB.

If you have found different findings then feel free to post your findings here to help the community. Also list your driving habits.

[TurtleBoy]

Originally Posted by VINCER0

See the thing is, I provided the documents that backed up my statements and observations. You're the one singularly obsessed with a sentence you misunderstood and took out of context.

Unlike some, I actually have a life (as post counts can show), so I don't have the desire or the time to "go on like this all day" like you want.

And I see the one deflecting is you because you still can't explain why my and other's car's 12V AGM is showing a reading of 13-14V after a day of not charging or driving.

The answer is; the 48V Lithium is charging the 12V AGM as per SIB.

If you have found different findings then feel free to post your findings here to help the community. Also list your driving habits.

LOL. Wow - you are just so far off base not sure we can bring you back.

We will give it a try though since I don't believe on giving up on anyone no matter how lost they are.

Your original statement was not correct. The 48v battery does not always top of the AGM battery when the engine is off. I was asking for your documentation to the contrary but finally in your own way admitted your statement was not correct.

I have never said that the 48v battery does not charge the AGM battery under specific circumstances, of course it does. It does it at least during the emergency charging function as outlined in the SIB. There may be other instances though. Is it triggered just by SOC, perhaps length of sleep mode, maybe a combination of the two?

All I was asking was if you had documentation on when that occurs. You obviously don't and after a lot of searching I have never seen any so at this point is it all a guess as to what actually triggers it.

Perhaps if you weren't so defensive, arrogant and demeaning you would have been able to follow the conversation rather than jumping to conclusions and trying to make yourself appear you knew what you were talking about.

[VINCER0]

Originally Posted by TurtleBoy

Your original statement was not correct. The 48v battery does not ALWAYS top of the AGM battery when the engine is off. I was asking for your documentation to the contrary but finally in your own way admitted your statement was not correct

Show me where I used the word "always" when describing my personal observations of the 48V charging the 12V in my car.

You can't just add words, make incorrect assumptions, and desperately cherry pick a sentence out of context...for what because you're embarrassed you have poor reading comprehension by literally misreading and misinterpreting everything I wrote?...LMAO.

Originally Posted by TurtleBoy

I have never said that the 48v battery does not charge the AGM battery under specific circumstances, of course it does.

It does it at least during the emergency charging function as outlined in the SIB.

There may be other instances though.

Is it triggered just by SOC, perhaps length of sleep mode, maybe a combination of the two?

Ding ding ding. Glad you finally agree with the answer I stated multiple times that in my observations with my driving habits and that of several others here; the 48V charges the 12V as per SIB.

Maybe there is hope for you yet. Bless your sweet heart.

Originally Posted by sjb993

Status after 24 hours on charge.
Bars in display 4 / 12V bat SoC 87% V 12.22 / 48V bat SoC 76% V 45.46

Status after 23 hours off charge (car not used since charge).
Bars in display 4 / 12V bat SoC 82% V 13.58 / 48V bat SoC 70% V 44.96

Status after 44 mile round trip (motorway/dual carriageway no hold-ups, car parked for 30 minutes mid-journey)
Bars in display 2 / 12V bat SoC 84% V 13.52 / 48V bat SoC 52% V 43.8

Now wondering why the 12V battery increased from 12.22V to 13.58V whilst the car was off charge, and why the bars dropped from 4 to 2 and the 48V dropped from SoC 70% to SoC 52% after 44 mile trip.

Originally Posted by paulockenden

While the car was off charge the 48V topped up the 12V to 13.5V (where it likes to sit).

https://g20.bimmerpost.com/forums/sh....php?t=1994933

[TurtleBoy]

Originally Posted by VINCER0

Show me where I used the word "always" when describing my personal observations of the 48V charging the 12V in my car.

You can't just add words, make incorrect assumptions, and desperately cherry picked a sentence out of context...for what because you're embarrassed you have poor reading comprehension by literally misreading and misinterpreting everything I wrote?...LMAO.

Wow, talk about someone who has not got a clue. Maybe just take a step back, get some humility and read the quote. I would imagine you have enough education that you will be able to read it as anyone else who understands English does. I have enough confidence in you that you will see it implies always and in context is the correct way to interpret it.

Question from the OP: "Lastly, no idea where this 14V reading is coming from in BimmerLink as there’s no way it’s accurate for a 12V at rest. Perhaps some sort of cached value that isn’t meaningful in this context."

Your answer: "When the engine is off, the 48V Lithium charges the 12V AGM in order to top it off. That ~14V is the result of that. When your car is on, your 12V will read around 14V as well."


You obviously have no intention of having an adult conversation so this will be my last post until the next time you post something that is questionable/incorrect. That occurred three times in this thread so you will likely be seeing me again.

[VINCER0]

Originally Posted by TurtleBoy

it implies always and in context is incorrect.

LMAO Glad you're also finally admitting you made incorrect assumptions, added words that weren't there, misread and misinterpreted what I wrote.

This is called progress. Bless your sweet heart.

But...why would my statement of me personally observing the 48V charging the 12V = "in context is incorrect"?

It in fact is absolutely correct in context. The bimmerlink readings prove it's correct in context.. The SIB documents that it's correct in context. The context being stated multiple times that my car isn't being driven often as were the others who stated the observations of the 48V charging the 12V as per SIB.

[TurtleBoy]

Originally Posted by VINCER0

LMAO Glad you're also finally admitting you made incorrect assumptions, added words that weren't there, misread and misinterpreted what I wrote.

This is called progress. Bless your sweet heart.

But...why would my statement of me personally observing the 48V charging the 12V = "in context is incorrect"?

It in fact is absolutely correct in context. The bimmerlink readings prove it's correct in context.. The SIB documents that it's correct in context. The context being stated multiple times that my car isn't being driven often as were the others who stated the observations of the 48V charging the 12V as per SIB.

Good catch on the typo/grammar, it has been corrected. You know darn well it was referring to interpreting it as always being correct.

Of course the rest of what you typed is irrelevant nonsense. You need to calm down, you are making yourself look foolish. You obviously have some knowledge to impart on others but your immaturity is going to turn people away from reading your posts.

Edit: Now I'm adhering to the last post comment.

[climhazzard]

Woah, things got a bit intense while I was away. To get back to data gathering…

It’s become a bit rainy here, but next time I plan to put the charger on I will first check the voltage reported by BimmerLink with the hood raised to see if that makes any difference. Based my understanding, having the hood raised without the external charger connected (or on) should deactivate the 48V system.

In the meantime, if any of you have the CTEK PRO25s, BimmerLink, and are interested in capturing before and after data on the 12v and 48v batteries that could be interesting.

[climhazzard]

OK, so this is (nerdy) interesting. I pulled data with the hood raised in diagnostic mode, which confirms the 48V system is disconnected on the dashboard. The ‘current battery voltage’ sensor was down to 11.92 from 14.04 and the 48V increased to 46.38 from 45.4.

I’m purely hypothesizing - the ‘current battery voltage’ sensor doesn’t seem to be synonymous with the 12V SoC as 11.9V is much lower than 65% by standard measurements (although we do not know the IBS algorithm). When the 48 V system is enabled, the value raised quite a bit. What’s being pushed to the battery amperage/current is an open question. This exhausts my knowledge of electricity .

[bimmer456]

Battery tender would be just for the 12v battery. If it’s a plug in Hybrid you would plug it in to maintain the hybrid battery. This may be all you need to also maintain the 12v battery.

[TurtleBoy]

Originally Posted by bimmer456

Battery tender would be just for the 12v battery. If it’s a plug in Hybrid you would plug it in to maintain the hybrid battery. This may be all you need to also maintain the 12v battery.

The 48v battery is part of the mild hybrid system not a PHEV.

[bimmer456]

Originally Posted by TurtleBoy

The 48v battery is part of the mild hybrid system not a PHEV.

If it’s a PHEV then you just drive it normally. Not sure if there’s a way to charge it during long term storage or if it doesn’t get a charge from driving does that damage the battery. Non plug in hybrids aren’t ideal unless it’s your daily driver. So not the best thing to put in an m340i just to get slightly better fuel economy or launch torque without an alternative way to maintain the battery.