LEAFer wrote:What happens to the LEAF traction battery in 1-2-3 months ? I've heard of Tesla accidents and the car being at salvage yards sitting unattended and ruining the (very expensive) battery.
Q: How much discharge is expected for the LEAF if not plugged in ?
Q: Is the solar panel (daytime, unobstructed) in any way able to maintain the health of the traction battery ?
Q: Is there a long-term "store it" mode in the LEAF (trickle charging while plugged in) ?
Provided there are no loads on the traction pack, the only drain is self-discharge and this is in the range of 3% per month.
The solar panel is only going to be useful for the auxiliary battery - the 12V 'starter' battery. If the car ships with lead acid here, expect about 20% per month of self discharge. The solar panel will help but since we don't yet know how much energy it provides, and how much of a load the car's systems will have on the aux battery, we really don't know if it's enough to keep the lead-acid battery healthy for long-term storage.
Lithium batteries generally don't want to be trickle charged (and the 110v Level 1 interface really isn't a trickle charge).
The Tesla uses the same type of lithium ion batteries used in laptops and other consumer products (either lithium cobalt or lithium polymer - don't recall which). It has different self discharge and charge/discharge needs than the lithium manganese battery used in the Leaf.
The Leaf should have a set of contactors (big relays) that disconnect the traction pack. It should also have a 'power disconnect' plug of some type that positively disables the traction pack even if the car activates the contactors (as in - someone inserts the key and tries to drive away). For storage longer than 3 months, it might be enough to put the car on jack stands so the wheels don't get flat spots, pull the traction disable plug, and put a 1A charger on the lead-acid battery.
(I work with lithium iron phosphate, and have put cars into long-term storage, but haven't yet put a Leaf into long term storage.