acensor
Well-known member
jray3 wrote, in part --
"Here's a very good study on the LEAF battery. http://www.mynissanleaf.com/wiki/index.php?title=Battery_Capacity_Loss "
That's a fascinating and informative page on what extends and depletes life of these kinds of batteries. Thanks!
On of the dominant factors shown there is temperature.
Higher is worse. Per their graph in best of all worlds the battery should sit at about 45-degrees farenheit..... All other things being equal much lower life span at 90-degrees.
That raises two questions at least:
Does that (low temp good, high temp bad) apply equally to a battery sitting inactive in the garage as to one actively charging and discharging?
Does the MiEV battery cooling system actively cool it while it's sitting on the charger in the garage? I ask because our garage can get up to 90+ in the summer.
The other thing in that article is that the average state of charge the battery is kept in effects the longevity an almost counter-intuitive direction.
The lower state of charge it is in the longer it lasts.
(of course this is only counterintuitive from a history of conventional lead acid batteries.)
If I'm understanding that right, the take-home message would be to NOT fully charge your MiEV if you don't expect to need to run the full 60 miles on it in the forseeable future.
That is, if your normal pattern of use is, say, 12 miles out and 12 miles back home, that you'd be better taking it off the charger after it's, oh, say, 70% charged than leaving it on to 100%.
That make any sense?
Alex
"Here's a very good study on the LEAF battery. http://www.mynissanleaf.com/wiki/index.php?title=Battery_Capacity_Loss "
That's a fascinating and informative page on what extends and depletes life of these kinds of batteries. Thanks!
On of the dominant factors shown there is temperature.
Higher is worse. Per their graph in best of all worlds the battery should sit at about 45-degrees farenheit..... All other things being equal much lower life span at 90-degrees.
That raises two questions at least:
Does that (low temp good, high temp bad) apply equally to a battery sitting inactive in the garage as to one actively charging and discharging?
Does the MiEV battery cooling system actively cool it while it's sitting on the charger in the garage? I ask because our garage can get up to 90+ in the summer.
The other thing in that article is that the average state of charge the battery is kept in effects the longevity an almost counter-intuitive direction.
The lower state of charge it is in the longer it lasts.
(of course this is only counterintuitive from a history of conventional lead acid batteries.)
If I'm understanding that right, the take-home message would be to NOT fully charge your MiEV if you don't expect to need to run the full 60 miles on it in the forseeable future.
That is, if your normal pattern of use is, say, 12 miles out and 12 miles back home, that you'd be better taking it off the charger after it's, oh, say, 70% charged than leaving it on to 100%.
That make any sense?
Alex