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  • Make this Smart, Modular and Cheap Lithium Battery Charger System in minutes!!

    I'm kinda new to the whole lithium-ion charging thing, so please bear with me.Looking at your diagram, I don't see where the actual charge circuitry is. I see a constant voltage power supply, a display, a thermostat, and a battery protection circuit. Where's the charging circuit? It's my understand - and I could be totally wrong here - that those balancing protection boards don't include any charging algorithm. In other words, they don't supply constant current until a certain point and then switch to constant voltage.On the diagram you point to the voltage adjustment pot on the power supply and say "turn this variable resistor to get safe yet fast charging current" - but that adjustment doesn't change the current. It changes the voltage.You specified a 2 ohm 10 watt resistor...

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    I'm kinda new to the whole lithium-ion charging thing, so please bear with me.Looking at your diagram, I don't see where the actual charge circuitry is. I see a constant voltage power supply, a display, a thermostat, and a battery protection circuit. Where's the charging circuit? It's my understand - and I could be totally wrong here - that those balancing protection boards don't include any charging algorithm. In other words, they don't supply constant current until a certain point and then switch to constant voltage.On the diagram you point to the voltage adjustment pot on the power supply and say "turn this variable resistor to get safe yet fast charging current" - but that adjustment doesn't change the current. It changes the voltage.You specified a 2 ohm 10 watt resistor on the positive voltage feed from the power supply to prevent over-current. How did you determine the resistance value?For example, if I have a 12v 20A power supply, but want to limit it to 15A, what resistor would I use?

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