The Smart BMS from bmsbattery contains an OZ890 chip from O2Micro, which has the advantage that it can be custom programmed, calibrated and the chip data can be read out, such as the individual battery cell voltages:

Smart bleeding BMS with OZ890 chip
Smart bleeding BMS with OZ890 chip

The OZ890 debug software is free, but it only works with a special USB-I2C adapter, which costs $99 without shipping costs from China. Note that common USB to I2C adapter boards don't work here.

OZ890 smart BMS USB-I2C adapter
OZ890 smart BMS USB-I2C adapter
OZ890 smart BMS USB-I2C adapter
OZ890 smart BMS USB-I2C adapter

For those interested, I can borrow you my adapter for €10 for two weeks, excluding shipping costs. The deposit is €50 which you get back after I received the adapter. You have to send back the adapter at your own expense, it is cheap mailbox post.

Note that, to save weight, the USB cable is not included:

USB cable
USB cable

Install the software, connect the adapter and run the program, that's all.

Links

Contact me HERE.

Do you have any comments about the website or problems with shopping? Please let me know.
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