The delta V and temperature bump are end of charge points for NiMH cells. They're charged with constant current up to the end of charge point. These methods are also used when charging the earlier EVs that use nickel metal hydride cells. So yes - there is absolutely an "EV" connection here - it just doesn't apply to the Leaf.Nubo wrote:I've read that certain batteries actually charge better at higher rates vs. trickle-charging. This is due to the way that some chargers determine the charging cutoff point. For consumer-type rechargeable batteries, a "smart charger" will usually use a combination of Delta-V (change in voltage over time), and DT/Dt (rate of temperature change over time). Changes in these values are interpreted as "signals" that the pack has reached a certain state of charge. At very low current levels, these "signals" can be harder to detect and the charger may have to fall back to it's fail-safe method of temperature cutoff, resulting in some degree of overcharging.
This info comes from consumer-grade cells and I have no idea if this has any bearing on the LEAF battery chemistry or charging algorithms.
That would be a much more clear message than saying "we felt it useful to include a Level 1 EVSE in a bag in the trunk but just like common sense we don't recommend you use it."garygid wrote:I AGREE!!!
IF (yes, IF) there is NO "non-political" reason, Nissan should say so.
Then, with sufficient time available, there is no technical reason to avoid using L1, and it does not harm the battery to use L1 frequently, or even exclusively.
Something like: "We do not recommend frequent L1 charging, but there is no known technical reason to avoid using L1 charging."
Not me, already thinking about how I'm going to custom-mount my V1Jimmydreams wrote:Yeah, but leave your radar detector in the car in the "ON" position for a few days = dead battery. It's happened to me on a few occasions. (I drive slower now and don't need a radar detector).mogur wrote:One interesting thing I discovered in studying the schematics is that the Leaf has the same oddity that most other Japanese cars seem to have: The accessory outlet is off if the car is not "On" or in "Acc". Our Acura did the same and it is highly annoying if you want to charge a cell phone or such when the car is off. I will be rewiring the Leaf just as I did on the Acura.
To each his/her own, I guess.
I completely agree. If you have 12 hours each night to charge then you can refill 60 miles each night. Actually I think L1 will prove faster than 5mph up to 80% charged. So a person may well get 6 to 7mph during the first 10 hours from a low start.PaulScott wrote: As some have mentioned already, the length of time might be a problem for some people, and BTW, this should always be phrased as "L1 charges at 5 miles of range for every hour of charging." instead of "It take 20 hours to charge at L1." This tells people who need to go X miles that they only need to charge enough to get where they are going instead of waiting for a full charge. A lot of my customers are under the impression they have to keep charging till full and this scares them.
This is exactly why I never supported the whole "it takes 20 hours or 8 hours to charge" and will just state that Level 1 charges at a rate of 5.5 miles per hour and Level 2 charges at a rate of 12.5 miles per hour.PaulScott wrote:A lot of my customers are under the impression they have to keep charging till full and this scares them.
Hmmm ... is this what the manual actually means ?AndyH wrote:Lead acid batteries lose about 20% of their charge each month, so they are routinely 'trickle charged' at maybe 1-2A to keep them full. Lithium only loses about 3% per month so doesn't need the 2A tourniquet to stop the bleeding. In a real sense, the Leaf's level 1 charge isn't a true 'trickle charge' as it's feeding about 5A into the pack initially.
Probably not. Maybe a tech writer decided that the 120V cord can only supply a trickle compared with 16A from an L2 EVSE.evnow wrote:Hmmm ... is this what the manual actually means ?AndyH wrote:In a real sense, the Leaf's level 1 charge isn't a true 'trickle charge' as it's feeding about 5A into the pack initially.
They are just saying don't top off the battery all the time ?