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Long-term Episode 204 · Question 9

Since its launch, the Xiaomi SU7 has achieved excellent results in multiple crash tests. How is the crash safety of the Xiaomi YU7?

Official answer

After the launch of the Xiaomi SU7, it received the highest five-star rating in the C-NCAP crash test, and in the China Insurance Automotive Safety Index (C-IASI) crash test, all safety tests also received the highest Excellent+ (G+) rating. In terms of crash safety, the Xiaomi YU7 also adopts an ultra-high safety standard design.

The cage-style body structure is the first line of passive safety protection in the event of a collision. The core requirement is to strengthen the structural strength of the passenger compartment to avoid collision intrusion, while absorbing or dispersing a large amount of collision energy through energy-absorbing crumple zones and structural design to protect the passenger compartment.

Taking forward collision as an example, the energy-absorbing box adopts a field-shaped cross-section design, greatly improving energy absorption efficiency. The front longitudinal beams present a three-stage bending through changes in cross-sectional size and inner/outer bending induction grooves, achieving efficient energy absorption. The root part of the longitudinal beam connected to the front wall of the passenger compartment uses 1500MPa and 2000MPa high-strength support plates to increase strength and reduce the risk of intrusion into the front wall of the passenger compartment.

Taking the strict small overlap collision as an example, through the upper side rail of the front compartment, cast aluminum tower cap, integrated die-cast aluminum triangular beam, and subframe, the body slide is guided so that the body slides over the obstacle during the collision, reducing the risk of direct impact on the A-pillar and passenger compartment; at the same time, combined with wheel rotation, the wheels are effectively thrown out of the vehicle body to prevent wheel intrusion into the passenger compartment.

Taking side collision and rollover conditions as examples, high-strength structures are needed to reduce passenger compartment intrusion. The Xiaomi YU7 uses 2200MPa hot-formed steel door anti-collision beams for all four doors, and embeds 2200MPa hot-formed steel into the A-pillars and B-pillars in the form of hot gas expansion tubes, effectively improving passenger compartment protection in scenarios such as side collisions and rollovers.

Taking rear collision as an example, the Xiaomi YU7 adopts a three-stage rear floor anti-collision design. The integrated die-cast rear floor relies on its high-strength advantage to protect passenger safety during collisions. At the same time, the three-stage design means that general rear-end accidents only require replacing locally damaged parts without replacing the integrated die-cast rear floor, balancing maintenance economy.

In addition, when a collision occurs, the seat belts quickly restrain occupants within the seat area, preventing significant forward movement due to inertia. At the same time, through efficient and precise restraint system matching, airbags ignite at millisecond levels and deploy rapidly according to different collision scenarios, providing effective protection for occupants and avoiding or mitigating secondary impacts between passengers and hard interior components, or even between passengers.

The Xiaomi YU7 comes standard with 7 airbags across all trims. Among them, the passenger-side irregular airbag design features two larger side wings, effectively reducing the risk of occupant heads sliding out of the airbag under collision inertia and colliding with hard objects such as the A-pillar and center console screen.

In addition, the side curtain airbags of the Xiaomi YU7 adopt a downward-curving design for the rear row area, effectively reducing the risk of occupant heads colliding with hard objects such as door panels under collision inertia.

To provide better safety protection for occupants of different body types, the Xiaomi YU7 has also added female occupant protection development covering all conditions and all seating positions, which exceeds C-NCAP and C-IASI testing standards.

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