Firefighters put out the spontaneous combustion of Zhengzhou new energy vehicles in the early morning 10 minute. What are the safety hazards of new energy vehicles?

The number of new energy vehicles in China has reached 26 1 10,000. With the rapid growth of new energy vehicles, the safety accidents of new energy vehicles have attracted people's attention. The safety hazards of new energy vehicles mainly include fire during charging, fire caused by battery propulsion or placement, fire caused by collision and rollover, and fire caused by wading.

There are potential safety hazards in the charging process of new energy vehicles.

There are also safety hazards in charging pure electric vehicles, especially when there is a small short circuit inside the battery, new energy vehicles are prone to fire. If charging for a long time will cause the battery to overheat, then the owner should charge the vehicle correctly according to the vehicle manual.

There are hidden dangers in thermal runaway batteries of new energy vehicles.

Thermal runaway battery belongs to thermal runaway management state in BMS: the battery will generate heat due to various internal electrochemical reactions during charging and discharging. If there is no good cooling system, the heat generated will accumulate inside the battery, which will gradually lead to dangerous situations such as power drop or even explosion and fire, that is, heat leakage. The heating of the battery is influenced by internal factors such as charge and discharge rate, internal resistance, DOD discharge depth, SOC current and capacity, and external factors such as ambient temperature and heat dissipation mode.

How to improve the safety of new energy vehicles?

To achieve load safety, it is necessary to strengthen the research on functional safety technology, deepen the research on functional safety objectives and safety risk limits, and achieve synergy with the research on charging characteristics and battery failure mechanism of power batteries; Improve the safety inspection specifications for electrical equipment and implement the technical specifications for on-site inspection of charging equipment. ; In terms of information security, the current research on border security technology extends to the in-depth study on the security and content of relevant standards. At the same time, it is necessary to combine the rise of high-performance application technology and wireless charging, carry out corresponding security technology research, and realize index quantification.

Generally speaking, although electric vehicles are becoming more and more popular, their safety problems have not been well solved. Consumers who have bought pure electric vehicles must pay more attention to their use.