Clarification on C34, C48, C51, and C52 in the BMS-C1 Circuit

[vybhav-nag]

I’ve noticed C34, C48, C51, and C52, each with a value of 100nF. It seems these capacitors could be intended for noise filtering or stability, but the exact purpose isn’t immediately clear from the circuit.

Can you confirm what these capacitors are primarily for? Are they critical for proper operation, or could the circuit function reliably without them.

[martinjaeger]

Yes, exactly. The intention is for noise filtering. And we are using two in series for improved reliability. If one fails short, the other one still prevents a short between + and -.

The caps were taken from the TI reference designs. I haven't tried what happens if they are not present.