Does the fact that the shielded cable of the BMS control board is not grounded 360° affect its anti-radiation interference effect?

Failure to achieve 360° grounding in shielded cables will severely impact their radiation immunity. The shielding layer's function is to absorb and reflect external electromagnetic fields, protecting internal signal lines. If the shielding layer is only grounded at a single, "pigtail" point, the inductance of the grounding lead can cause the shielding layer to fail at high frequencies, allowing external interference to couple in and internal noise to radiate out. 360° grounding means that the shielding layer, through the connector's metal shell or conductive pad, achieves a low-impedance, seamless connection with the equipment housing across its entire circumference. This ensures the continuity of shielding effectiveness and is crucial for guaranteeing good performance in radiated immunity and radiated emission tests.