MesabiRangeMike
- Nov 6, 2023
- 9
- Joined
- Nov 6, 2023
- Messages
- 9
Converted two DeWalt 18V NiCd battery packs to Li-ion. Each pack has a 5S 15A BMS boards (BW-6022-5S), five Samsung 30Q 18650 3000mAh 15A batteries, and a 10K NTC thermistor. Both packs exhibit the same problem, when used in various tools, in that a quick mashing of the power trigger causes the tool to work for a microsecond then fail as if the pack was near complete discharge. If the trigger is slowly pressed all the way down the tool will behave as expected and will run at full speed for longer than I can hold the trigger without cramping/tiring.
The batteries were spot welded together rather than soldered and were purchased new from the 18650batterystore. After the first rebuilt pack exhibited this problem I tested the remaining 5 batteries using the Discharge-Charge-Test feature on a Opus BT-C3100 charger with no indication that they were anything but fresh and not reclaimed. The DeWalt battery charger will charge the packs, but errors out (rapid blinking) near the end of the charge cycle.
Any tips as to what to check would be greatly appreciated
The batteries were spot welded together rather than soldered and were purchased new from the 18650batterystore. After the first rebuilt pack exhibited this problem I tested the remaining 5 batteries using the Discharge-Charge-Test feature on a Opus BT-C3100 charger with no indication that they were anything but fresh and not reclaimed. The DeWalt battery charger will charge the packs, but errors out (rapid blinking) near the end of the charge cycle.
Any tips as to what to check would be greatly appreciated