Will fast charging affect the battery life of electric vehicles?

As an urban transportation tool, electric bicycles are quite marketable because of their lightness and flexibility. However, what if the electric car on the road suddenly runs out of power? Some businesses see business opportunities from here and have launched a mobile fast charging station called 'One Yuan Charge for 10 Minutes　　 However, netizens questioned that the high voltage and high current of the fast charging method will damage the battery, resulting in insufficient battery storage in the later stage. So, is the statement that 'fast charging of electric vehicles hurts the battery' is true? 　　 As we all know, the charging of lithium batteries is divided into three stages, namely constant current precharging, high current constant current charging and constant voltage charging. Let me talk about the charging process of the lithium battery first: 　　 Due to the particularity of the lithium battery, overvoltage or undervoltage will cause the battery to be scrapped, so the principle of the current lithium battery charging and discharging protection circuit is to measure the voltage of the lithium battery, and then judge whether the lithium battery is in Normal state (non-overvoltage, non-undervoltage). The charging of lithium batteries is divided into three stages, namely constant current precharging, high current constant current charging and constant voltage charging.　　 When the voltage is lower than 3.0V, the charger will pre-charge the lithium battery with a current of 100mA. The purpose is to slowly recover the over-discharged lithium battery, which is a protective measure. Qualified chargers will have this charging stage. Then came the ones related to the problem.　　 When the voltage of the lithium battery is higher than 3.0V, it enters the second stage, the high current constant current charging stage. The charging current can be appropriately increased. According to different batteries, the current can range from 0.1C to several C, where C refers to the battery capacity, such as a 2600mAh lithium battery, and 0.1C refers to a current of 260mA.　　In this charging stage, the standard charging recommended by the country is to charge with a current of 0.1C. This is the standard charging. However, since the standard charging standard was proposed very early, it was proposed more than ten years ago. At that time, because the lithium battery technology was far less stable than it is now (high current charging is not allowed), there is such a standard; the only advantage of using standard charging is that the charging process is stable, and the probability of explosion is very small; the disadvantage is the cost time.　　Fast charging refers to charging with a current greater than 0.1C at this stage. If the lithium battery capacity is 2600mAh, then the standard charging current is 260mA, as long as the charging current is greater than 260mA, it can be defined as fast charging. However, as far as the current level of lithium batteries and the level of charge and discharge management chips are concerned, charging with a current of 1C is no problem. So fast charging is not as dangerous as imagined. Generally, the charging current of fast charging is 0.2~0.8C, so fast charging is still safe. Due to improvements in recent years, current chargers are basically fast-charging types. The last stage of lithium battery charging is the constant voltage charging stage. In this stage, when the voltage of the lithium battery is detected to be 4.2V, the charger enters the constant voltage charging mode. At this stage, the charging voltage is constant at 4.2V, and the charging current is increasing. The smaller (slowly full, the current will definitely become smaller). When the charging current is less than 100mA, it is judged that the battery is full and the charging circuit is cut off.　　Batteries of battery cars generally have two types: lead-acid batteries and lithium batteries. These batteries are composed of a number of batteries (lead-acid battery type is composed of 6 or 8 series and parallel; lithium battery type is composed of several lithium batteries in series and parallel). At present, most battery car batteries do not have battery equalization management, so the life of the battery pack is far less than that of a single battery. This also explains why the battery of the battery car is not durable and will be scrapped in about a year! 　　 In short The conclusion is: fast charging refers to a charging method with a charging current greater than 0.1C. This charging method has a very small impact on life and stability for a single lithium battery; but if it is for a battery pack of a battery car, fast charging It is an act of trading time for battery life.　　 The last thing I want to say is: using the standard charger to charge the battery car is no problem; but for those charging stations that are fully charged in 10 minutes, we must pay attention to the use of these charging stations will definitely greatly affect the battery life.　　 In addition, for battery packs, battery balance is more important. Fast charging has an impact on the life of the battery pack precisely because the balance problem of the battery pack has not been solved. Prev: Electric vehicle battery maintenance Daquan