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thingstodo · 01-15-2012, 07:53 PM

Another hour. DC output of the DC to AC inverter is 154.7V. The NiCd battery string is at 107.8V. That's a bit of jump, to 1.52V per cell. The current is still about 2.9A, so my toaster must be increasing it's resistance? There is 154.7 - 107.8 = 46.9V across the resistor now. At 2.9A, that works out to a resistance of 16.2 ohms. That is hard for me to explain - no change in current or other conditions but a change in resistance - but I observed it.

Just before the charger is disconnected. DC into the DC to AC inverter, 35.2A at 13.7V. Output of the inverter is 2.8A. This is measured with a clampon meter. It measured 2.9A on the negative and -2.7 on the positive ... so I guess the real value is 2.8A. The voltage is 154.6V. The battery string is at 107.7V.

15 minutes later (after putting things away in the garage) the battery string is at 101.1V standing voltage. This is higher than I was expecting. It is 1.42V per cell. I guess I should check later.

01-15-2012, 07:53 PM	#51 (permalink)
thingstodo Master EcoModder Join Date: Sep 2010 Location: Saskatoon, canada Posts: 1,488 Ford Prefect - '18 Ford F150 XLT XTR Tess - '22 Tesla Y LR Thanks: 746 Thanked 565 Times in 447 Posts	DC to AC inverter as a manual charger - OK so far Another hour. DC output of the DC to AC inverter is 154.7V. The NiCd battery string is at 107.8V. That's a bit of jump, to 1.52V per cell. The current is still about 2.9A, so my toaster must be increasing it's resistance? There is 154.7 - 107.8 = 46.9V across the resistor now. At 2.9A, that works out to a resistance of 16.2 ohms. That is hard for me to explain - no change in current or other conditions but a change in resistance - but I observed it. Just before the charger is disconnected. DC into the DC to AC inverter, 35.2A at 13.7V. Output of the inverter is 2.8A. This is measured with a clampon meter. It measured 2.9A on the negative and -2.7 on the positive ... so I guess the real value is 2.8A. The voltage is 154.6V. The battery string is at 107.7V. 15 minutes later (after putting things away in the garage) the battery string is at 101.1V standing voltage. This is higher than I was expecting. It is 1.42V per cell. I guess I should check later.