Nemo
Member
- Joined
- Apr 26, 2019
- Messages
- 53
To get my feet wet before moving on to bigger pack builds I thought I would try my hand at upgrading a few NiMH powertool batteries to Li-ion. I've salvaged cells from powertools packs, and done the standard capacity/SD/Heaterchecks. I'm aiming for a 2p5s pack to replace the NiMH on a dewalt 18V drill, but I'm stumbling on the charging/BMS/Balancing portion of the build. I don't have an existing Li-ion charger for the tool or a compatible BMS from the packs I broke down (because I tossed them before learning I should keep them).I'm thinking of converting probably 3-4 batteries, but can't rely on getting the same brand tool packs (and therefore BMS) so I don't think investing in a branded charger is the way to go.After reviewing other posts in to forum it seems to break down to three options:
-BMS with charging management and a dumb power supply
- BMS without charge management and a charger
- No BMS and a charger
I was hoping to get some feedback on the pros/cons of the various approaches with respect to safety, functionality, and cost.
-BMS with charging management and a dumb power supply
- BMS without charge management and a charger
- No BMS and a charger
I was hoping to get some feedback on the pros/cons of the various approaches with respect to safety, functionality, and cost.