China, as a major country in the production and use of electric bicycles in the world, does provide great convenience for the people in terms of short-distance travel. The popularity of electric bicycles not only reduces people's dependence on cars and alleviates traffic pressure, but also is favored for their lower cost and environmental protection characteristics. However, just as there are two sides to the coin, e-bikes come with a series of safety concerns along with convenience.
Recently, CCTV focused on the report on "Why Electric Bicycles Lead to Disasters", highlighting the potential safety hazards behind the convenience of electric bicycles as a means of travel. The report analyzes in detail the causes of frequent fire accidents of electric bicycles, mainly focusing on electrical failures, battery thermal runaway and illegal modifications.
First of all, electrical failure and battery thermal runaway are the main causes of e-bike fire accidents. This is mainly due to the uneven quality of lithium batteries sold on the market, and many of them are "three no" products, which cannot meet safety standards. In addition, the illegal modification of e-bikes has also exacerbated the severity of the problem. In order to increase the driving distance or increase the speed, some users will add or modify the battery without permission, which not only violates national regulations, but also brings great safety hazards to the electric bicycle.
Secondly, the report also revealed the problem of electric bicycles entering the building to charge at home. This kind of behavior can easily cause fires, and once a fire breaks out, it often causes serious consequences of mass deaths and injuries. However, due to the difficulty of supervision and the limited punishment level, this problem has not been effectively solved.
In the face of these problems, the report put forward a series of recommendations and measures. First of all, we should strengthen the supervision of the production and sales of electric bicycles, strictly implement national standards, and crack down on illegal modification and sales of substandard products. Secondly, the public should be raised to raise awareness of the safety of e-bikes, guide people to use and charge e-bikes correctly, and avoid bringing them into residential buildings. In addition, it is also necessary to increase the investigation and punishment of electric bicycle fire accidents, and severely punish violators to set an example.
Regular battery manufacturers have also taken multiple measures to ensure the safety of batteries to ensure that the batteries have a high degree of safety and stability during use. First of all, in terms of the selection of battery cells, regular manufacturers tend to use lithium iron phosphate batteries, which show excellent performance due to their stable structure. At the same time, the addition of the battery management system (BMS) provides strong technical support for the safe use of batteries. As the "brain" of the battery, the BMS system can accurately extract and control various electrical performance data of the battery through the built-in battery management chip and the written program. This means that the status of the battery can be monitored in real time, and key information such as voltage and remaining power can be accurately displayed. What's more, in abnormal situations such as high temperatures, the BMS system can respond quickly, reduce risks through power outages and other methods, and prevent fire accidents.
In contrast, retrofit batteries often lack these safety precautions. They are usually produced by black workshops, and the quality of the cells is uneven, and the safety protection is seriously insufficient, and they cannot meet the national standards. Moreover, it is easy to cause short circuits or thermal runaway due to mismatch and other problems during the use of modified batteries, which can lead to fires. In addition, the modification of the body of the electric bicycle, including changes in the structure, motor power, wiring, etc., also increases the safety risk. These modifications are often carried out in non-professional maintenance points, lacking the necessary technical support and supervision, which brings great hidden dangers to the safe use of electric bicycles.
In order to cope with these safety problems, some charging pile companies have adopted technical measures to restrict and improve charging safety. At the same time, Continental is also speeding up the formulation of mandatory national standards for lithium-ion batteries for electric bicycles, in order to improve the safety of batteries from the source. In addition, it is also necessary to further improve laws and regulations at the national level to provide a strong legal guarantee for the safety management and governance of electric bicycles.
The report of the CCTV focus interview conducted an in-depth analysis and discussion of the safety issues of electric bicycles, and put forward targeted suggestions and measures. This not only helps to improve the public's attention to the safety of electric bicycles, but also provides strong public opinion support for relevant departments to strengthen supervision and governance.
What do you think about the series of disasters caused by electric vehicles?