agm battery charge issue
what would cause a AGM battery to reduce its charging amperage, without the voltage reaching the set voltage cutoff in a CC mode stage of a charger example, battery is at 13.6 yet a pd9245 in boost...
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LittleBill wrote:The PD only holds voltage. The battery pulls amps. Once the PD is hitting 14.4 it is done increasing and the amps taper. The PD has no idea what is at the other end of the wire. Only way to push more amps is to increase the supply voltage but the supply is topped out at 14.4 volts. PD can only hold the voltage and wait for the battery to catch up.
my issue and my confusion, again is around 13.6v at the battery. PD is doing 14.4, but the amperage is going down around 20amps and still tapering, PD should be cranking the amperage up to get to 14, but its not doing it.
For fast charging the circuit voltage drop should be 200 mV or less at full current.
