Forum Discussion
BFL13
Jul 04, 2015Explorer II
Getting to full SG before "controller Bulk" ends is a new one on me.
(If it is correct what I think I saw where full SG happened an hour before the controller reached 14.8, the set Vabs, and went to Float)
That means from the battery's point of view, "Absorption" ended when the SG stopped rising at whatever voltage that was, and from then on it was in "Overcharge" until the controller's "Bulk" was over.
Can't figure out when the battery went from "Bulk" to "Absorption" as there was no defining moment. The Vector charger does its Absorption with the battery voltage rising from 14 to 14.8, but with amps tapering. So you can tell when it goes from Bulk to Absorption by when the amps start to taper.
Here, the amps did not really taper except for the business where the controller output in watts was a fixed amount, so as battery voltage rose, amps fell.
That is just normal buck converter activity, not to be confused with the "battery acceptance" tapering. Might be a bit of that in there too, but also you have all that heat loss at the high SOC where you can have more amps but the battery is not absorbing them.
Not sure the usual charging stage names mean much in this case, or else I am not understanding what I think I saw?
(If it is correct what I think I saw where full SG happened an hour before the controller reached 14.8, the set Vabs, and went to Float)
That means from the battery's point of view, "Absorption" ended when the SG stopped rising at whatever voltage that was, and from then on it was in "Overcharge" until the controller's "Bulk" was over.
Can't figure out when the battery went from "Bulk" to "Absorption" as there was no defining moment. The Vector charger does its Absorption with the battery voltage rising from 14 to 14.8, but with amps tapering. So you can tell when it goes from Bulk to Absorption by when the amps start to taper.
Here, the amps did not really taper except for the business where the controller output in watts was a fixed amount, so as battery voltage rose, amps fell.
That is just normal buck converter activity, not to be confused with the "battery acceptance" tapering. Might be a bit of that in there too, but also you have all that heat loss at the high SOC where you can have more amps but the battery is not absorbing them.
Not sure the usual charging stage names mean much in this case, or else I am not understanding what I think I saw?
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