Is this BMS legit?

you mean connect the BMS to the battery? what BMS do you plan to use?

Yes. You can bypass the current limit and use the BMS simply to balance the cells. You’ll need a 10S constant current/constant voltage PSU. I made a video using a similar one here: https://www.youtube.com/watch?v=jxHQjlHv1y4

I need to learn to make cards protection for lithium cells

Are you using it for an esk8? Why do you need to build one vs buy one?

I need to learn because I have special projects and need a BMS at hand, in my country are not achieved easily, must be imported, generating a delay in the applications

I don’t think it will be much easier making one yourself, you will need custom made PCBs and such. This may help you tho.

http://raphaelchang.com/projects/bms/

thanks michaeld33

if anyone knows where I can learn to make a BMS would help me a lot.

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Look at the link above, that has helpful info for building a BMS