arnis
Well-known member
Awesome. But there are not a lot of devices on a Leaf that draw 750W on 12V system.
Ok, now we know that there might be a voltage drop due to inverter not being instantaneous (at least on 2011/12 model).
In terms of energy quantity this has more or less no effect on battery state of charge.
I would add more new information around the main topic: LEAF's 12V battery behaviors - and why they go bad
I have one BMW OEM AGM battery that was fully charged 4 months ago. It was just sitting for all that time.
Measured voltage before doing anything: 12.5V at room temperature.
We have some guys here who think that this is something something...
So.. lets do a really easy experiment.
I connected a trickle charger, that is limited to 13.99V and 1A charge rate.
As soon as I made connection it started charging the battery. At around 0,7A.
Only 15 minutes later battery was at 13.43V and charge rate dropped to 0,55A.
An hour later voltage jumped to 13.7-13.8V and charge rate dropped below 0.4A.
I've been keeping the power supply connected for few days now. And it still pushes
0.3-0.5A. Battery voltage more or less stable.
So what can we learn from that? Battery did not discharge noticeable. Actually not even 5%.
And it is absolutely pointless to try to charge it any further because it will not accept it.
But it will accept eloctricity. Around 5W is being pushed in by a charger/power-supply that doesn't
stop like smart trickle chargers do. Aka what normal DC-DC converter would do.
And this is ONE of the reasons why Leaf switches to 13.0V mode.
I will just, in the name of the science, keep the power supply active for a day or two just to be absolutely sure
that no more charge can be absorbed. And will disconnect supply. Will measure voltage again. A day and a week later. As a proof.
All this matches scientific data that I collected in this topic earlier.
Ok, now we know that there might be a voltage drop due to inverter not being instantaneous (at least on 2011/12 model).
In terms of energy quantity this has more or less no effect on battery state of charge.
I would add more new information around the main topic: LEAF's 12V battery behaviors - and why they go bad
I have one BMW OEM AGM battery that was fully charged 4 months ago. It was just sitting for all that time.
Measured voltage before doing anything: 12.5V at room temperature.
We have some guys here who think that this is something something...
So.. lets do a really easy experiment.
I connected a trickle charger, that is limited to 13.99V and 1A charge rate.
As soon as I made connection it started charging the battery. At around 0,7A.
Only 15 minutes later battery was at 13.43V and charge rate dropped to 0,55A.
An hour later voltage jumped to 13.7-13.8V and charge rate dropped below 0.4A.
I've been keeping the power supply connected for few days now. And it still pushes
0.3-0.5A. Battery voltage more or less stable.
So what can we learn from that? Battery did not discharge noticeable. Actually not even 5%.
And it is absolutely pointless to try to charge it any further because it will not accept it.
But it will accept eloctricity. Around 5W is being pushed in by a charger/power-supply that doesn't
stop like smart trickle chargers do. Aka what normal DC-DC converter would do.
And this is ONE of the reasons why Leaf switches to 13.0V mode.
I will just, in the name of the science, keep the power supply active for a day or two just to be absolutely sure
that no more charge can be absorbed. And will disconnect supply. Will measure voltage again. A day and a week later. As a proof.
All this matches scientific data that I collected in this topic earlier.