Guru
Joined: 17/10/2017
Location: BelgiumPosts: 472
| Posted: 08:17am 18 Jan 2026 |
Nice project! Do you implement a software calibration per cell, or are you happy with the accuracy?
I have made a simular project for my mb31 cells, its build arround an esp32 main controller board and the cell boards use atmega 328 mcu's. They communicate over uart bus isolated by opto can tranceivers0. Works really well, but best result is when cell voltages were calibrated, the 10bit internal dac is a bit on the low side, I use 0.1% resistors and an external 0.1% reference ic.
I'm working on an stm32 based version wich has an internal 12 bit dac, I aim for a 1mV resolution.