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i plan to put an index here in the first post of the schematics and any firmware that i can extract. When it gets enough critical mass i may start a github or hackaday project for collaboration and sharing.
Ryobi makes a bunch of power tools that use these packs, but the packs seem to fail quite prematurely and often. Many have been disassembled to find perfectly good cells but the BMS has shut off the pack. The bms chip seems to have a permanent failure mode "feature".
The LG and Samsung cells (10s2p 18650) that are used have no-explosion and no-fire specifications for both over charge and discharge, so it is a big waste of cells--just check out all the folks trying to sell their junk pack on ebay because it won't charge or work anymore.
Index:
1. T1 and T2 terminals, what is the function? Ryobi 40V BMS troubleshooting and repair
2. Driving the FETs, Ryobi 40V BMS troubleshooting and repair
[Edit 3/27/22]
3. How to do a Reset on the board--see post #91 for the old packs, and post #135 for the newer ones.
Ryobi makes a bunch of power tools that use these packs, but the packs seem to fail quite prematurely and often. Many have been disassembled to find perfectly good cells but the BMS has shut off the pack. The bms chip seems to have a permanent failure mode "feature".
The LG and Samsung cells (10s2p 18650) that are used have no-explosion and no-fire specifications for both over charge and discharge, so it is a big waste of cells--just check out all the folks trying to sell their junk pack on ebay because it won't charge or work anymore.
Index:
1. T1 and T2 terminals, what is the function? Ryobi 40V BMS troubleshooting and repair
2. Driving the FETs, Ryobi 40V BMS troubleshooting and repair
[Edit 3/27/22]
3. How to do a Reset on the board--see post #91 for the old packs, and post #135 for the newer ones.
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