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Collision warning with auto brake complete high voltage disconnect during crash— A real-life safety perspective

机译:带自动刹车的碰撞警告和碰撞时完全断开高压—真实的安全视角

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A safety system in electric vehicle (EV) activates to protect the occupant during the vehicle accident. It consists of crash sensors to detect the impact of the vehicle accident. Crash sensor activates the switch present in the high voltage battery box. The switch controls the high voltage (HV) battery main contactors and disconnects the HV battery supply. Crash zones to be defined and crash sensor to be calibrated for unintentional activation of the crash sensor. Response time should be fast enough to cut off the High voltage battery supply before the high voltage components like PDB and high voltage cable gets crushed. This paper will brief about possible collision warning with auto brake & high voltage components crash zones, vehicle safety system architecture in EV. Collision warning with auto brake, where the area in front of the vehicle is continuously monitored with the help of long-range radar and a forward-sensing wide-angle camera can fit on the cabin. In addition to monitoring front of the vehicle, system monitors 360 degree of the vehicle by using impact/crash sensor. A warning and brake support will be provided for collisions with other vehicles, both moving and stationary. Additionally, if the driver does not intervene inspite of the warning and the possible collision is judged to be unavoidable, intervention braking will be automatically applied to slow down the vehicle. The entire system will be controlled and monitored by EV controller. This aims at reducing impact speeds and thus the risk for consequences. Apart from the above safety, incase if the crash happened unavoidably, the complete HV systems will be disconnected automatically to protect the harm for the driver & passenger. EV controller monitors the high voltage, in case of any leakage, HV supply from the battery is shut down.
机译:电动汽车(EV)的安全系统会在发生车辆事故时启动以保护乘员。它由碰撞传感器组成,以检测车辆事故的影响。碰撞传感器激活高压电池盒中的开关。开关控制高压(HV)电池主接触器,并断开HV电池电源。为了意外激活碰撞传感器,需要定义碰撞区域并校准碰撞传感器。响应时间应足够快,以在高压组件(如PDB和高压电缆)损坏之前切断高压电池的电源。本文将简要介绍自动刹车和高压组件碰撞区域可能发生的碰撞警告,电动汽车中的车辆安全系统架构。带有自动刹车的碰撞警告,借助远程雷达可以连续监控车辆前方的区域,机舱中可以安装前向感应广角摄像头。除了监控车辆的前部,系统还通过使用碰撞/碰撞传感器监控车辆的360度。将提供警告和刹车支持,以防止与其他行驶中和静止中的车辆发生碰撞。此外,如果驾驶员在未发出警告的情况下也未进行干预,并且判断可能的碰撞是不可避免的,则将自动应用干预制动以使车辆减速。整个系统将由EV控制器进行控制和监视。这样做的目的是降低撞击速度,从而降低后果风险。除上述安全性外,万一发生不可避免的撞车事故,整个高压系统将自动断开,以保护对驾驶员和乘客的伤害。 EV控制器监视高压,以防万一泄漏时电池的高压电源关闭。

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