- The circuit uses the PC power supply , or any 12V power source.
-The circuit uses The "Temperature slope" method which is the most accurate and safe method, in this case the packs are charged by monitoring the temperature and end the charge when the charger sense the end of charge dT/dt, which depends on the battery type.
Two parameters are used as a backup to avoid over charging:
- Maximum time: The charger will stop after a predetermined time according to the battery capacity
- Maximum temperature: You can set the Max. battery temperature to stop the charging when it becomes too hot ( about 50 C ).
- The charger uses the PC serial port, i have built the software with Microsoft Visual Basic 6 with an Access database to store the battery parameters and charging profiles.
- A log file is generated with each charging process showing the charged capacity, charging time, cutoff method ( time or Max. temperature or Max. slope )
- The charging characteristics is displayed online through a graph ( Time versus temperature ) to monitor the battery temperature.
- You can discharge your packs as well as measuring it's actual capacity.
- The charger has been tested with more than 50 battery packs, it realy works great.