Beneath the Skin: An Engineer's Deep Dive into BYD's Chassis Architectures for Global Procurement Professionals
04 Jun 2025
Let's embark on this undercarriage exploration, model by model.
BYD Song Pro DM-i: The Popular Contender's Foundation
Adjustable Link: One of the links is adjustable, allowing for wheel alignment.
Subframe: A rear subframe is present, to which the suspension links are mounted.
BYD Qin L DM-i: Evolution in the Sedan Segment?
Front Suspension Details:The Qin L DM-i also uses a MacPherson strut front suspension.
Mid-Chassis: Protection and Layout:
BYD Han Series (DM-i & EV): Flagship Aspirations, Evolving Underpinnings
Underbody Aerodynamics & Protection - A Point of Critique:
Mid-Chassis: Battery, Fuel, and Platform Compromises:
BYD Song L DM-i: The Purpose-Built PHEV Platform Advantage?
Front Suspension:MacPherson strut front suspension.
Lower Control Arms: Single-layer stamped steel, similar to the Qin L.
Cable Routing: Rear component wiring and brake lines are routed under plastic covers.
Exhaust Heat Shielding: Extensive, comparable to the Qin L, though perhaps slightly less.
BYD Tang DM-i: The SUV Flagship's Foundation
Component Protection: Metal shield for refrigerant and high-voltage lines.
Exhaust Heat Shielding: Deemed more extensive than on the Han.
BYD Yuan Plus (Atto 3): The E-Platform 3.0 Pioneer
Front Suspension:MacPherson strut front suspension.
Mid-Chassis: Battery Integration and Unique Protection:
Synthesis & Cross-Model Observations
Suspension Evolution & Segmentation: There's a clear hierarchy and evolution in suspension systems.
Considerations for Global Procurement
For international procurement teams, this deep dive offers several actionable insights: