Could the 'sat all winter' be a contributor; did he do maintenance
charges at least monthly?
On 2/6/2013 2:47 PM, Chuck Hursch wrote:
More feedback from the guy that has an Elcon that gassed the batteries
a lot and ran warm at 120VAC.
He said this is the only charger he's had, at least for this EV, and I
think this is the only car-sized EV he's had. His roundtrip daily
commute is 10 miles. Lost a battery after about five months of use
starting in April, although the car had sat through the previous
winter (2011/2). I suspect his batteries are from the summer or fall
of 2011. So my guess is he's got 1.5 year-old batteries with maybe
2-3K miles on them (assuming ~200-250 workdays @ 10mi/day + misc.
miles). Kind of young to be gassing so heavily, since new-ish
batteries should be able to reach the USBattery-recommended constant
voltage setpoint pretty easily without a lot of amps. However, I am
aware of USBattery recommending (at least at one time) an equalization
charge current of 11A, which if that is dialed in as the third-stage
constant current phase, that would produce a lot of gassing and
stink. It seemed that USBattery changed their charging
recommendations a year or two ago, from IU to IUI, so it's hard to
guess what is dialed into the charger. I'd really like to measure one
with a voltmeter and clip-on ammeter.
Chuck
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