Excellent Idea and I am totally interested.
Agree with your bare minimum requirements. Want to reiterate them and also have a few questions:
1. Adjustable charging current (0,1A-3,0A) in 0,1A steps. - Could this be done using Constant Current (without PWM on low end) from .1-3A? (Upgrade from OPUS)
2. Support for multiple chemistries. - Perfect
3. Temperature monitoring (45C max below 2A, 60C max below 3A). - Temp sensor to monitor cell temp (approximate) or internal board temps?
4. 4 cell channels - Perfect
5. Active cooling if temperature exceeds 45C, and if all channels are active above 2,5A. - Temp at cells or board location? If for cells, maybe active cooling can turn on lower, say 35C? Variable speed fan please, or connector for us to plug our own in.
8. Nickel coated phosphor bronze/brass rails. - Perfect
9. Internal resistance measurement. - Perfect
11. Adjustable max voltage for lithium ion charging: 3,90V-4,20V in 0,1V steps. - Perfect
12. Storage charge mode: 3,6V. - Could this also be adjustable (from say 3.2-3.7V) or would discharge mode have adjustable termination voltages?
15. 100-200-350-500mA-750mA discharging functionality. - Adjustable termination voltages possible? Say 2.X-3.7V?