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Makes And Models => Zero Motorcycles Forum | 2013+ => Topic started by: dukecola on December 05, 2016, 11:17:20 PM

Title: DIY charger folks, is there a published 2016 battery charging sequence?
Post by: dukecola on December 05, 2016, 11:17:20 PM

So, I got Elcons on the way and am on the list for a Diginow, but am interested in building one to stage at a location 120 mi from home for day trips so I don't have to carry one with me.  Is the charging regime for the battery pack published somewhere? Thanks.

Title: Re: DIY charger folks, is there a published 2016 battery charging sequence?
Post by: BrianTRice@gmail.com on December 06, 2016, 05:22:45 AM

I don't think it is as such! I'd say that you can figure this out from observation:

Battery voltage at 100% at rest (neither charging nor discharging) should be 116V.

Voltage while charging will exceed that by 1V or so.

A conservative charger should operate like the Elcon as CC-CV (constant current, then constant voltage).

Nominal voltage of 102V holds across most of the range from 40% to about 80%. It tapers outside of that range per the Farasis cell datasheet curves.

I'm not sure what minimum voltage really is - 3V absolute cell minimum per Farasis times 28 yields 84V, but I'd vote for a little higher before applying a high charge rate.

Matching 117V while in CV mode is acceptable if you're charging above maybe 4kW or so. You'd want the charger to reduce current to keep voltage at or below the threshold until it reaches some minimum current where it should just cut off.