撞车后，为何车门总是打不开？

Core Viewpoint - The article discusses the safety concerns surrounding the door locking mechanisms of electric vehicles, particularly in emergency situations, highlighting the importance of both electronic and physical structures in ensuring passenger safety [4][7]. Group 1: Incident Overview - A recent collision involving a Xiaomi SU7 Ultra raised concerns about the safety of electric vehicle doors, as the vehicle caught fire after the accident and bystanders struggled to open the doors [5][6][7]. Group 2: Door Lock Mechanism - The door lock system consists of two main components: the lock itself and the latch, requiring both to be disengaged to open the door [8][9]. - In the event of a collision, the airbag deployment triggers an emergency locking mechanism, which locks the doors to secure passengers and prevent secondary injuries [10][13]. Group 3: Emergency Unlocking Process - After a collision, the vehicle's sensors determine if the airbag should deploy, which subsequently unlocks the doors once the vehicle is stationary, but the doors remain closed until manually opened [14][17]. - The complexity of the locking mechanism means that if any part of the system fails during a collision, it could hinder the ability to unlock the doors [19]. Group 4: Redundancy in Safety Features - Manufacturers often implement redundant power sources and wiring to ensure the locking mechanism remains functional even after severe collisions [20][21]. - Some vehicles may also incorporate physical emergency structures to provide an additional layer of safety in case of electronic failures [21]. Group 5: Electronic vs. Mechanical Door Handles - Many modern vehicles, including the Xiaomi SU7, utilize electronic door handles, which can pose risks in emergencies if the electronic components fail [25][26]. - Traditional mechanical door handles allow for easier access in emergencies, as they do not rely on electronic systems [24][28]. Group 6: Regulatory Developments - A recent draft regulation from the Ministry of Industry and Information Technology mandates that all vehicle door handles must include a physical structure, which could enhance safety standards in the industry [29]. - The article suggests that the automotive industry is shifting focus back to fundamental safety features after a period of prioritizing technological advancements [29].