This is BMS for Li based batteries. Top level balancing of cells are used. Can be used in Vehicles and small scale applications. I designed this system for 16S2P you can use upto 48 cells with slight modification. I used Samsung 18650 26J cells I designed the PCB according to this dimension , you can modiffy for other cell sizes. Features of the systems are
- Alarms when battery reches max or min threshold voltages.
- alarms when Battery package voltage exceeds set limit.
- ALarms when a current reaches maximum set limit value.
- Monitors voltage of each cell.
- Data acn be looged to pc.
- Cell upto 48 can be used.
- Cell Temperature (max & min, with high alarm)
- Fault Code Tracking (keeps a record of the past 5 faults)
- Charger Control (0-5V to suit TC Charger and others)
Parts used : 1.LM78LXX Series 3-Terminal Voltage Regulators 2.PIC16F1827 and the PIC12F1822 Microcontrollers.