Other Parts Discussed in Thread: BQ76PL455EVM
Good day!
In the previous thread, it is said that the ground for connecting the battery cells and the ground for the 5V supply must be different.
"There is typically isolation between the HV side (with the battery stack) and the LV side (with the MCU). Because of this isolation, the grounds will be different."
But the bq76pl455evm test board has a single ground for all connections (battery cells, microcontroller / PC, thermistors and GPIOs). This can be seen in the schematic (SLUUBA7A–April 2015–Revised July 2015) and confirmed by measuring the board with a multimeter.
Question: Does the answer on the form only refer to HV and LV grounds? There is no ground on the HV balancing board, since the total voltage of the connected cells is 48V. In this case, the ground can be common for all connections and there will be no malfunctions?
