What is the best lithium battery controller board for a screwdriver to remake with kadimya?

Question

Electronics

Peace and goodness to all!
Who understands circuitry, tell me the most preferred controller for lithium for 4-5 cans, which
- has a balancer
- knows how to properly charge and turn off charging
- turns off at 3v on any bank - Can
give 30 A load
- has short circuit protection
- maybe I forgot or did not take into account
I want to convert a screwdriver from cadmium to lithium. Now I have installed some Chinese BMS 30A, so when the button is pressed sharply, it goes into defense.

Answer 1

And you check the currents, because in the load the Shurik can consume less than 30, and during the start of the engine, 35-40, for a very short time. Well, not every Shurik is exactly like that, but in principle. Mine, for example, when starting the engine, eats up to 32-35, and in the load before blocking only 28-30.
It is possible that your BMS has the ability to adjust, which is done by soldering a couple of parts, but not a fact.

Answer 2

Such things are calculated according to the type of engine, taking into account its starting characteristics. It will be difficult to choose from the finished one. You can try https://ru.aliexpress.com/item/Aihasd-21-100A-5S-B... - but most likely the banks do not draw the starting current of the engine and are cut off due to a voltage drop on the banks.