Justification for Low energy warning to the drivers 2014-5-13 规定该条内容的目的是为了保证车辆行驶剩余电量不多，能够行驶的距离不长时，应该有一个醒目提醒信号装置提醒驾驶员尽快充电。

5.3.1.5 of EVS When REESS energy level is below a certain value, it will affect the normal running of the vehicle, the driver shall be informed by a signal (e.g. flashing optical or audible signal) to be charged as soon as possible. The remaining distance when the driver shall be informed by a signal , remaining battery can continue to travel the distance specified by the manufacturer themselves. 闪烁光或声响信号，强调重要性。提醒信号装置工作时，剩余电量能够行驶的距离由制造厂自行规定，因为，各国的交通状况，充电站设置情况以及车辆本身的设计各不相同，因此，剩余电量的最低要求本法规不做规定。 there should be a clear warning flashing light or sound signal to remind the driver that the vehicle should be charged as soon as possible.

Why low energy warning should be mandatory The purpose of the warning signal is to remind the driver to charge as soon as possible when the REESS remaining capacity can only travel a short distance. If no mandatory regulations with this warning signal, the vehicle may run out battery energy and suddenly suspend when driving on the congested roads or highway, which shall bring critical risks to normal traffic areas. Currently, all conventional vehicles equip low fuel warning devices. When there is little fuel left, warning signal shall light to alert the driver to refuel as soon as possible. For electric vehicles, the only difference between conventional vehicle is that the fuel warning device is replaced by a charging warning device. Why low energy warning should be mandatory The purpose of the warning signal is to remind the driver to charge as soon as possible when the REESS remaining capacity can only travel a short distance. If no mandatory regulations with this warning signal, the vehicle may run out battery energy and suddenly suspend when driving on the congested roads or highway, which shall bring critical risks to normal traffic areas. Currently, all conventional vehicles equip low fuel warning devices. When there is little fuel left, warning signal shall light to alert the driver to refuel as soon as possible. For electric vehicles, the only difference between conventional vehicle is that the fuel warning device is replaced by a charging warning device.

Safety requirements for conventional vehicles have been established, and have formed a complete safety regulation architecture, including general safety, active safety and passive safety, etc. Different safety requirements belongs to different regulations. ECE R121 Uniform provisions concerning the approval of vehicles with regard to the location and identification of hand controls, tell-tales and indicators have specified the mandatory signal devices and indicators, including the fuel level indicator, warning device and graphic symbols. The regulations of conventional vehicles in US, Japan and China also have already included this fuel level warning requirements. Safety requirements for conventional vehicles have been established, and have formed a complete safety regulation architecture, including general safety, active safety and passive safety, etc. Different safety requirements belongs to different regulations. have specified the mandatory signal devices and indicators, including the fuel level indicator, warning device and graphic symbols. The regulations of conventional vehicles in US, Japan and China also have already included this fuel level warning requirements.

There are many special safety requirements for electric vehicles which are different from the conventional vehicles’, currently no other regulations issue these differences except EVS. Consequently, as a global advanced regulation, the EVS should reflect the safety differences from the conventional vehicles thoughtful. Therefore, we suggested that low energy/low remaining distance should be included in EVS. There are many special safety requirements for electric vehicles which are different from the conventional vehicles’, currently no other regulations issue these differences except EVS. Consequently, as a global advanced regulation, the EVS should reflect the safety differences from the conventional vehicles thoughtful. Therefore, we suggested that low energy/low remaining distance should be included in EVS.

5.3.2 Indication of low energy content of RESS ISO6469.2 5.3.2 Indication of low energy content of RESS If a low state of charge (SOC) in the RESS has a relevant impact on the vehicle driving performance, a low energy content of the RESS shall be indicated to the driver by an obvious device (e.g. a visual or audible signal). At the indicated low state of charge specified by the vehicle manufacturer, the vehicle shall meet the following requirements. a）It shall be possible to move the vehicle out of the traffic area using its own propulsion system. ） b) A minimum energy reserve shall still be available for the lighting system as required by National and/or International Standards or regulations, when there is no independent energy storage for the auxiliary electrical systems. 如果RESS的低荷电状态（SOC）影响到车辆的行驶，应通过一个明显的装置向驾驶员显示（例如：声或光信号）。当车辆处在制造厂规定的低剩余电量状态时，应满足下列要求： a） 通过其自身的驱动系统能够使车辆驶出交通区域； b） 当没有独立的能量存储装置为辅助电力系统供电时，最小剩余电量应能为照明系统提供满足有关标准规定所需的电量。