Does the lack of twisted-pair cables on the differential signal lines of the BMS control board reduce its noise immunity?

For differential signals transmitted over long distances, whether externally or internally, the lack of twisted-pair cabling significantly reduces their common-mode interference immunity. Twisted-pair cabling cancels magnetic field coupling interference by using opposite polarities of the induced noise voltages in adjacent twisted sections, and helps maintain line balance, suppressing external interference in common-mode form. If parallel lines are used, the line is susceptible to differential-mode interference and sensitive to magnetic fields. Therefore, in interference-prone environments, critical differential signals such as CAN and RS485 must use twisted-pair cabling, ensuring matching terminating resistors. Internal differential traces should also be as parallel, of equal length, and close together as possible, with a complete ground plane underneath to maintain good signal integrity and immunity.