This was AD6DM’s first foray into building a small battery pack. The soldering job was horrendous, due to learning how to solder.
This battery’s goal was learning and the goal of powering both QRP (<= 10 watt) and QRO (up to 100 watt) radios. I also wanted at-a-glance voltage readings, so it incorporated a LED volt meter. All batteries made by DenCo use Anderson Powerpole connectors since hams like that kind of 12v connector. The main wires are 12 AWG with 200°C insulation.
General Specs:
Created: May 5, 2019.
Cells: K2 26650 2.85Ah 3.2v LiFePO4
BMS: HX-4S-F100A
Configuration: 4S2P
Total Capacity: 5.7Ah
Current Owner: KG5OCW Greg
Cell Specifications:
Brand: K2
Model: LFP26650P
Capacity: 2850mah
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
BMS Specifications:
HX-4S-F100A BMS
1. Continuous discharge current: 100A
2. Instantaneous discharge current: 120A
3. Charging Voltage: Iron lithium charger 14.8V (Switching power supply: 15V-16V)
4. Charging Current: 10A(Max)
5. Overcharge detection voltage: 3.75V±0.05V
6. Over charge detection delay time: 1300 ms
7. Over charge release voltage: 3.6V±0.05V
8. Electricity equalization detection voltage: 3.6V±0.05V
9. Electricity equalization release voltage: 3.59V±0.05V
10 .Electricity equalization current: 58mA
11. Over discharge detection voltage: 2.1V±0.08V
12. Over discharge detection delay time: 145s
13. Over discharge release voltage: 2.30V±0.1V
14. Over current detection voltage: 200mV
15. Over current detection delay time: 20mS
16. Over current protection current: 120V±10A
17. Over current protection release: cut off the load
18. Detection condition: Exterior load short circuit
19. Detection delay time: 300us
20. Over current protection: Cut off load
21. Temperature Protection: Can use external temperature switch
22. Main circuit conduction resistance ~20mΩ
23. Working current: ~30uA
24. Working Temperature: -20°C-80°C
25. Size: 70 x 60 x 8.5mm
