Safety risks that cannot be avoided by replacing lead-acid batteries with lithium batteries for electric bicycles

From 2019 to the present, there have been many spontaneous combustion and explosion accidents in electric bicycles, resulting in major property losses and casualties. Most of them are caused by the charging of lithium batteries in electric bicycles. Therefore, the safety of lithium batteries has received more attention. .　　 Because the industries with high demand for food delivery, logistics and short-distance counterparts are gradually switching from fuel-fueled motorcycles to electric vehicles, the demand for electric bicycles is increasing. At the same time, it also stimulated the consumption growth of the entire electric bicycle. In addition, the electric vehicle power battery market is saturated, and some uncompetitive battery companies that were eliminated in the last wave of power lithium batteries have moved into the electric bicycle market, which has also increased the safety hazards of electric bicycle lithium batteries. For a long time, lead-acid batteries have an absolute cost advantage over lithium batteries, which is the reason why electric bicycles mainly use lead-acid batteries. Compared with ordinary lead-acid batteries, the price of lithium batteries is about 26% higher. Due to the introduction of the new national standard, strict requirements on the quality of electric vehicles and motor power have been imposed, forcing electric bicycle manufacturers to replace lead-acid batteries with higher energy density and smaller power lithium batteries. Since then, the electric bicycle industry has begun. Market trend of replacing lead-acid batteries with lithium batteries.　Due to the continuous increase in the concentration of the new energy automobile industry and the increase in technical requirements, many small and medium-sized battery companies that have lost the market have transformed to the small-power lithium battery market with lower technical thresholds. According to the data of electronic concern, the shipment volume of small-power lithium batteries mainly used for electric bicycles has exceeded 14GWh in 2019, and the scale of output value has exceeded 10 billion, which has grown at a growth rate of over 50% for two consecutive years. At the same time, as the cost of lithium batteries continues to decline, the cost gap between small-power lithium batteries and lead-acid batteries is also shrinking at a rate of nearly 10% per year. However, lithium batteries still cannot avoid the safety risks of violent collision or fire and explosion under high temperature conditions, and the separation and protection of lithium batteries are still very important. According to statistics, an average of about 2,000 electric bicycle fires occur every year in the country, and nearly half of the accidents occur in the summer. Therefore, in the process of leaving the battery, it is very important for thermal control and the detection of external unstable elements, but this in turn increases the production cost of the electric bicycle manufacturer. Electronics believes that, compared to technical standards, what is more important is that my country's electric bicycle industry currently lacks the identification of relevant responsible parties, and many electric bicycle accidents that have occurred before have encountered difficulties in identifying responsibility, and battery and electric bicycle manufacturers shirk each other's responsibility. The problem. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Shenzhen Lithium Battery PACK Factory Comprehensive Interpretation of Lithium Battery Production Process