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
Yes, I'm going to charge at a constant current for the entire 50% SOC. At a 4A charging current, it will take some 25 hours to charge. At 1 sec per measurement, there's lots of data. I may change program to 5 sec/measurement. I'm limited to 4 - 5A constant current charging because I don't have a bigger constant current power supply that can also get up to 17V.
I'm going to add temperature to the mix. I doubt battery temperature will be any different than ambient (for this upcoming test), but it will be interesting to have. Actually, just measuring bat temp is kind of meaningless. Ambient temp also needs to be measured. However, I just have one of these temp probes. The DS18B20 probe is excellent. It just uses 2-wires and outputs a digital signal! It doesn't require a power line to power its electronics. It gets its power when the digital signal is HI. Amazing!
Grizz- This display works well with Arduino. You don't have to store the data on a SD card.
I'm going to add temperature to the mix. I doubt battery temperature will be any different than ambient (for this upcoming test), but it will be interesting to have. Actually, just measuring bat temp is kind of meaningless. Ambient temp also needs to be measured. However, I just have one of these temp probes. The DS18B20 probe is excellent. It just uses 2-wires and outputs a digital signal! It doesn't require a power line to power its electronics. It gets its power when the digital signal is HI. Amazing!
Grizz- This display works well with Arduino. You don't have to store the data on a SD card.
