Some cool battery graphs
I'm checking out the Costco GC2 batteries and Iota 55A converter as well as the new 16-bit a/d for Arduino. Prior to discharging the 208AH GC2 batteries, they were top charged with 16V for about ...
Forum Discussion
In this test I discharged the battery for about 54 min (same procedure as before) and then charged the battery with a constant current of 4A. Charging with a constant current is very interesting. Battery voltage will rise at a linear slope. Any changes in the slope is due to changes in battery resistance. The greater the slope, the greater the change in resistance.
This test was a proof of concept trial run. The battery was only discharged by 12.22 AH (94.1% SOC). I'll run a deeper discharge later.
The blue curve in the charge plot is voltage. The pink curve is SOC. The right side y-axis units is % SOC. The SOC plot increases linearly from 94.1% to over 100%. The battery reaches 100% when voltage is at 15.06V. When battery is close to 100% the resistance increases rapidly.
This test was a proof of concept trial run. The battery was only discharged by 12.22 AH (94.1% SOC). I'll run a deeper discharge later.
The blue curve in the charge plot is voltage. The pink curve is SOC. The right side y-axis units is % SOC. The SOC plot increases linearly from 94.1% to over 100%. The battery reaches 100% when voltage is at 15.06V. When battery is close to 100% the resistance increases rapidly.
