I thought it was about time to duplicate the QRP Batt 1 that I had sent to NJ7V Charlie, now that I had a new Icom IC-705.
While this protection board limits to 8A, these cells are capable of pulse to 150A. Perhaps higher capacity, lesser drain 26650’s by K2 would be suitable for this board.
Created: November 2, 2020.
Cells: K2 26650 2.85Ah 3.2v LiFePO4 (capable of 150A pulse max)
Protection Board: HX-4S-3828 LiFePO4 BMS PCB Board for 26650 or 18650 LiFePO4.
Total Rated Capacity: 2.85Ah.
Current Owner: AD6DM Dennis.
Watt Hours: 9.4
Nominal Voltage: 3.2
Fully Charged Voltage: 3.65 (recommended), 4.1 (maximum)
Fully Discharged Voltage: 2.5 (recommended), 2.0 (maximum)
Continuous Discharge (A): 42
Pulse 30 Seconds Discharge (A): 50
Short Pulse Discharge (A): 150
Charge Current (A): 5
This board does NOT BALANCE.
Module size: 38 x 28 x 3.8mm / 1.49 x 1.10 x 0.15 inch
Upper limit working current: 8A
Upper limit instantaneous current: 20A
Over charge voltage range: 3.65±0.05V
Over discharge voltage range: 2.35V±0.05V
Static current: <30uA
Charge voltage: 14.4V-15 V
Short circuit protection: yes. Delay self recovery
Tips: After the wiring is successful, the board needs to be charged and activated before it has output.