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NiMH powertool upgrade
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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/Heater checks.  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.
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Messages In This Thread
NiMH powertool upgrade - by Nemo - 05-01-2019, 06:35 PM
RE: NiMH powertool upgrade - by daromer - 05-01-2019, 06:49 PM
RE: NiMH powertool upgrade - by jdeadman - 05-01-2019, 07:26 PM
RE: NiMH powertool upgrade - by Nemo - 05-01-2019, 09:21 PM
RE: NiMH powertool upgrade - by jdeadman - 05-01-2019, 10:25 PM
RE: NiMH powertool upgrade - by Nemo - 05-02-2019, 02:05 AM
RE: NiMH powertool upgrade - by Geek - 05-02-2019, 02:47 AM
RE: NiMH powertool upgrade - by Nemo - 05-02-2019, 07:01 PM
RE: NiMH powertool upgrade - by jdeadman - 05-02-2019, 04:44 AM
RE: NiMH powertool upgrade - by daromer - 05-02-2019, 07:31 PM
RE: NiMH powertool upgrade - by Nemo - 05-10-2019, 02:05 AM
RE: NiMH powertool upgrade - by Chablis_m - 05-10-2019, 04:59 AM
RE: NiMH powertool upgrade - by thanar - 05-10-2019, 09:34 AM
RE: NiMH powertool upgrade - by Nemo - 05-10-2019, 06:09 PM
RE: NiMH powertool upgrade - by Nemo - 06-09-2019, 01:55 AM

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