18650 lithium rechargeable battery

Is fast charging harmful to the 18650 lithium rechargeable battery?

As pure electric vehicles are gradually chosen by many consumers, the use of pure electric vehicles has been controversial. In particular, in the face of slow charging and limited 18650 lithium rechargeable battery life of electric vehicles, the development of fast charging technology seems to have solved the problem of slow charging of electric vehicles to a certain extent, but in fact, is fast charging technology really harmless to the 18650 lithium rechargeable battery? In addition, due to the short 18650 lithium rechargeable battery life and lack of charging stations, many people often use up their batteries when using electric vehicles. Is this really okay? Fast charging is used for emergency, and slow charging is advocated for daily use. In fact, there is a big difference between fast charging and ordinary charging, especially in principle. In order to shorten the charging time, fast charging requires the use of fast charging heads and fast charging cables and direct charging with DC voltage. Therefore, a large number of current ions will flow from the positive electrode of the 18650 lithium rechargeable battery to the negative electrode at a very fast and efficient speed, thereby completing the fast charging process. In this process, the DC voltage will be higher than the actual 18650 lithium rechargeable battery voltage. During long-term fast charging, the temperature of the 18650 lithium rechargeable battery pack will rise, and its service life will also be greatly reduced. Therefore, for the 18650 lithium rechargeable battery of pure electric vehicles, fast charging is used in emergency or urgent charging, while slow charging should be used to supplement energy in daily use. This is a relatively wise choice, which will play a certain role in protecting the 18650 lithium rechargeable battery and extending the 18650 lithium rechargeable battery life. The 18650 lithium rechargeable battery should not be exhausted, and the lack of power will affect the life. In addition, there is a widely spread saying that the 18650 lithium rechargeable battery should be fully exhausted before charging. In fact, this statement is also wrong. This practice is called deep discharge in the industry. Since most electric vehicles currently use ternary lithium batteries, the cycle life will increase sharply with the decrease of the depth of discharge (DoD). Therefore, deep discharge is not conducive to 18650 lithium rechargeable battery charging and discharging. In addition, after deep discharge, recharging will cause part of the current to dissipate in the form of heat, which is not conducive to 18650 lithium rechargeable battery life. Therefore, whether it is electronic products or pure electric vehicles, in daily use, it is not recommended to use them for a long time through deep discharge and fast charging. It can be used occasionally in special circumstances. After all, cars are tools to serve people, but if conditions permit, it is still recommended to use slow charging. At the same time, it is best to supplement energy when the 18650 lithium rechargeable battery has more than 10% power. Electricity is not yet mature, and batteries need to be improved. At this stage, pure electric vehicles are not yet mature, even though electric vehicles have more advantages in emissions and instant acceleration than fuel vehicles. However, the convenience in daily use is still not as good as that of fuel vehicles. We cannot use this to criticize the shortcomings of pure electric vehicles, but it is obvious that the bottleneck of batteries restricts the daily development of pure electric vehicles. In the current situation, batteries are one of the most important parts of pure electric vehicles, and the length of their service life depends very much on the usage habits of consumers. Wrong usage habits will not only shorten the 18650 lithium rechargeable battery life, but also greatly increase the cost of use. Therefore, it is essential to develop correct charging habits. This is also the information that must be disseminated and promoted during the promotion of pure electric vehicles. Conclusion: Even though some manufacturers have realized the 18650 lithium rechargeable battery loss problem caused by fast charging, and will reduce this loss through some means, in essence, fast charging is to exchange 18650 lithium rechargeable battery life for charging speed, and over-discharge is a wrong perception that ignores the nature of batteries. In summary, consumers should try to charge slowly and in time during the daily use of pure electric vehicles to extend the service life of electric vehicles!

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