EV Power Unit Bracket Layout for Collision Cable Protection

The support structure is divided into two distinct parts: a lower support portion that supports the bottom of the power unit, and an upper support portion (bracket) that supports the upper part of the power unit. This segmentation allows each part to perform its specific function - the lower support provides stable mounting while the upper bracket prevents rearward rotation during collision, thereby protecting the high-voltage cable without requiring a completely rigid structure.

The upper support portion acts as an intermediary element between the power unit and the vehicle body. It specifically addresses the rotation problem by providing a constraint at the upper portion of the power unit, which indirectly protects the high-voltage cable located behind the power unit. This intermediary structure prevents the harmful rotation motion without requiring direct support of the entire power unit.

The connection between the power unit and vehicle body is designed to be dynamic rather than rigid. The fastening members are configured to maintain the positional relationship between the power unit and vehicle body under normal conditions, but to allow relative movement when collision loads exceed a predetermined threshold. This dynamic connection prevents rotation during minor collisions while protecting both the vehicle body and power unit from damage during severe collisions by allowing controlled deformation.

The fastening members change their mechanical properties based on the applied load. Under normal operating conditions, they maintain a rigid connection with high strength to prevent rotation. When collision load exceeds the predetermined value, the fastening members undergo structural change (such as deformation or detachment) to reduce the connection strength, allowing the power unit to move relative to the vehicle body and absorb excess energy, thereby preventing damage to critical components.