On Sat, Jan 19, 2013 at 6:44 AM, Thos True <[email protected]> wrote:
> According to one Nissan engineer that I spoke with in 2011, the Leaf is
> designed to not charge above 80% nor discharge below 20%, which corresponds
> to the on on-board display's full and empty.

The LEAF has an actual battery capacity of 24 kWh as advertised.
Nissan lets you use about 21 kWh of the 24 kWh.

A 100% charge will charge the pack to about 94% total capacity.
A 80% charge will charge the pack to about 77% total capacity.

The first low battery warning comes on around 17% total capacity.
The 2nd low battery warning comes on around 9% total capacity.
The car goes into turtle mode around 2% total capacity and shuts down
shortly afterwards.

Voltage plots against charge confirm that these numbers are pretty close.

Nissan is reserving no-where close to 20% on the top and bottom for actual use.

This might be the case if the engineer really meant that they normally
expect people to only charge to 80% and to charge up again by the time
they get to the first low battery warning.

-Dave
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