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Leaf Battery 'Full' Voltage

Posted: Tue Jul 14, 2020 1:40 pm
by DaveBlack
Hi all - I am just playing getting the PDM / Charger working on the bench to charge the 30kwh pack I have.

I have the Dc-Dc converter working, and pretty certain the standard charge feature is working also. The PDM plays a little beep which I believe indicates it is ready to charge - and my charging cable 'flashes' which is its indicator that it is charging OK.

However it only charges for about 10 seconds, before the charging cables flashing light goes steady - indicated charging finished.

My pack reads a voltage of 392v - about 4.1 volts per cell. Which to me would indicate fully charged - but I have read online these cells charge at 4.2v (403.2v). It is highly likely that at 392v the resistance across the pack is high enough that no further charging is possible to avoid damage.

Was wondering if anyone had any information about yours packs - what level they sit at when fully charged?



Re: Leaf Battery 'Full' Voltage

Posted: Tue Jul 14, 2020 1:54 pm
by coleafrado
Earlier cars charged to 4.15V, newer ones charge to 4.2V.

Re: Leaf Battery 'Full' Voltage

Posted: Wed Jul 15, 2020 4:20 am
by DaveBlack
Okay thanks, pretty certain mine is taking the near 4.1v as fully charged as even if you charge at 4.2v the cells will settle lower than that.

My Leaf must have been crashed straight off the driveway!


Re: Leaf Battery 'Full' Voltage

Posted: Tue Jul 28, 2020 4:38 am
by arnis
4.135V as maximum per cell. Actually 4.2V is safe but it will not last for years.