What are the misunderstandings in the use of lithium batteries?

Misunderstanding 1: Lithium batteries will also have a memory effect. Many friends believe that lithium batteries must be used up, otherwise there may be memory effects. In fact, this concept originated from nickel-cadmium batteries. Nickel-cadmium batteries have a memory effect. , The battery will show less and less power as the number of times of use increases. Later nickel-hydrogen batteries have been improved, and there is no obvious memory effect, because the nickel-hydrogen batteries will still show a certain degree of crystallization As a result, the capacity is reduced, and it is still necessary to charge and discharge frequently to maintain its normal power. The lithium battery basically has no memory effect and can be charged and discharged at any time without affecting the battery's capacity. From another perspective, the battery memory effect refers to the reversible failure of the battery, that is, the ability to recover after the battery fails. Lithium batteries are irreversible, and their performance and capacity will only decrease as they are used. In addition, to eliminate battery memory, deep charge and deep discharge are required, that is, the battery voltage must reach 1.0V, and it is impossible for mobile phones to hold the battery voltage to 1V. Shut down at time. Years of facts have proved that only half of the lithium battery repair power supplies with a discharge depth of more than 99% can be activated, and the remaining half are scrapped! Misunderstanding 2: New lithium batteries need to be activated. This is another old topic. A large part of consumers think that the battery needs to be activated. Almost all salespeople say that the battery needs to be fully charged for the first three times for 12 hours to activate the battery. . Most consumers have done this, and some people attribute poor battery performance to poor battery activation. So does the battery need to be activated? The answer is yes, to activate! However, this process is completed by the processing manufacturer, has nothing to do with the user, and the user has no ability to complete it. The real activation process of a lithium battery is as follows: the lithium battery shell is filled with electrolyte and sealed and formed, which is constant voltage charging and then discharging. This is done for several cycles, so that the electrode is fully infiltrated in the electrolyte and fully activated until the capacity reaches the required value. This is The activation process is divided into capacity, which means that the lithium battery has already been activated in the user's hands after leaving the factory. In addition, the activation process of some of the batteries requires the battery to be in an open state, and then seal it after activation. Unless you have battery processing equipment, how to complete it? Myth 3: Lithium batteries can only be charged and discharged 500 times. I believe most consumers have heard of it. The life of lithium batteries is 500 times. 500 times of charging and discharging. After this number of times, the battery will die. Many friends want to extend the battery. The life of the battery is charged only when the battery is completely exhausted. Does this really extend the life of the battery? the answer is negative. A lithium battery used only half of its power on the first day, and then it was fully charged. If it is still the case the next day, that is, use half of the charge and charge it twice in total. This can only be counted as one charging cycle, not two. Therefore, it may usually take several times to complete a cycle. Every time a charging cycle is completed, the power will decrease a bit. However, the reduction is very small, and high-quality batteries will still retain 80% of the original power after charging for many cycles. Assuming that the amount of electricity that is fully discharged at one time is Q, and the cycle of a battery is 500 times, then the total amount of electricity it supplies in its life is 500Q. If we charge when the electricity is half used, set the number of charges to A, and simply solve it, 0.5 ×Q×Au003d500Q, A should be 1000 times. Therefore, regarding battery life, we can use cycles to measure, but never use times to measure. Misunderstanding 4: In pursuit of the highest performance, overcharge and overdischarge, there are some friends who like to overcharge and discharge the battery in order to pursue the performance of the battery. This will cause permanent damage to the positive and negative electrodes of the lithium battery. From the molecular level, it can be intuitively understood that over-discharge will cause excessive release of lithium ions from the negative electrode carbon, causing its sheet structure to collapse, and over-charging will cause too much Lithium ions are hardly stuffed into the carbon structure of the negative electrode, and some of them can no longer be released. This is why lithium batteries are usually equipped with charge and discharge control circuits. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What are the maintenance tips for electric vehicle batteries?