I have just disassembled a battery pack from a Lenovo laptop (Series: 45N1005 with six cells, Specs: 10.8V, 5.2Ah, 57Wh) and I would like to use the BMS for controlling a single 18650 cell (2.8Ah) which should power an Arduino board. I would like to have the overvoltage and undervoltage protection (see also my previous post).
I have tried to do some testing and see if I can read the voltage of a single battery through the BMS terminals, but the voltage is 0, so I'm wondering why.
Please see below how the board looks. Unfortunately, I couldn't find any information about its parameters or components and therefore I would like to ask if any of you can help me to figure out:
- If this BMS can be used to control the charging/discharging of a single cell instead of 6;
- How to test the BMS so that I can figure out the parameters. Which methods should I use?
Basically, I'm more interested in the overdischarge protection. That is, a cut-off voltage of 2.7 V.
Here is the unknown BMS with the sketched battery connection.
The only searchable keyword that looked relevant was "94v-0", but the results were totally different than what I have.