18650 - Part 15 - Reviving Dead Cells

This video is about Reviving Dead 18650 Cells.
When your charger does not want to charge these cells, and your voltmeter shows between 0 and 3V, then watch this video for a solid solution.
It is a fact that li-ion cells cannot go lower then about 3V to keep them in good condition. However, a one time draining the battery too much does not mean that the battery is destroyed forever.
However, alot of chargers (and bms's) think that the batterypack is faulty because it does not have the values as should be.
In my case, I salvage alot of cells out of ebike battery packs. There is mostly a piece of software/hardware safeguarding the battery condition. When the bike does not want to start, people go to the bikeshop to have a "read-out" of the battery pack.
Their equipment will tell them that one part is faulty, or the complete pack.
This is good news for us ....

[@ingegijsel3445]

Working with ebikes alot. Glad to hear you can salvage the faulty battery packs.

[@tv175s3]

Glad to see you still working the 18650, it has been a while... The Opus bt-c3100 is similar charger but with some advantages to the Liitokala, it charges also 1.5V batteries like AA and AAA. So when you insert a 18650 at 1V its starts charging, it sense the battery somehow and adjust the charging current. At first it will be 30-100mA, when the V goes up it wil go up to 500mA. Sometimes it stops at 1.5V but inserting it again starts a new charge session. Still having plans for a Powerwall?

[@Sailingandelectronics]

The powerwall is a work in progress, but the end is in sight. Will be 14S 80p to start. Work took too much time from my hobbies... (lame excuse, I know...)

[@tv175s3]

@@Sailingandelectronics Same story here, I think I have now enough cells for indeed also a 14s80p bank. Do you known what setup you gonna use? Charger, BMS, Inverter,.... I would like to see videos or schematic on these topics. Especially the grid connections looks intresting. I'm also in the country like you.