Analysis on the safe use of lithium-ion batteries

Lithium-ion batteries are durable goods. Do not equip them with expensive original chargers. Generally, branded ordinary chargers are sufficient, and the price is 15-20 yuan, eliminating the limitation of relying on mobile phones for direct charging. Dock chargers are divided into fast charging (about 2-3 hours) and slow charging (up to 10 hours). It is better to choose fast charging if there are more batteries. In addition, due to the characteristics of lithium-ion batteries, do not perform discharge and overcharge operations. The battery life depends entirely on the effective charging time. In other words, even if you start charging after only half of it, it has no effect on battery life. 1. Recognize the memory effect The battery memory effect refers to the reversible failure of the battery, that is, the ability to recover after the battery fails. The memory effect means that the battery automatically maintains this specific tendency after being subjected to a specific working cycle for a long time. The earliest meaning of this is in nickel-cadmium batteries, nickel-cadmium pouch-type batteries do not have a memory effect, and sintered batteries have a memory effect. Nickel-metal-hydrogen (commonly known as nickel-hydrogen) batteries are not restricted by the meaning of this memory effect. Recommendation 1: It is not necessary to discharge the battery before each charge, and it is harmful, because the service life of the battery is needlessly shortened. Recommendation 2: It is not advisable to use a resistor to connect the positive and negative poles of the battery to discharge. The current cannot be controlled, and it is easy to over-discharge to 0V, and even lead to the polarity reversal of the battery in the series battery pack. 2. To activate the battery, the lithium-ion battery needs to go through the following process before leaving the factory: the lithium-ion battery shell is filled with electrolyte-sealed-formed, which is constant voltage charging and then discharging. This is done for several cycles to make the electrode fully infiltrate the electrolyte. , Fully activated, until the capacity reaches the requirement, this is the activation process-capacity division, which is to test the capacity of the battery, select batteries with different performance (capacity) to classify, classify the battery, and perform capacity matching, etc. The resulting lithium The ion battery is already activated by the user. The time for the battery delivered by the battery factory to reach the user can sometimes be very long, as short as 1 month, or as long as half a year. At this time, because the battery electrode material will passivate, the manufacturer recommends that the battery be used for the first time. Five full charge and discharge processes to eliminate passivation of electrode materials and achieve maximum capacity. 3. Don't charge the Ni-MH battery for 12 hours in the first three times because of the replenishment and trickle charging process. It may take about 5 hours to reach the perfect full charge state, but not 12 hours. The constant current and constant voltage charging characteristics of lithium-ion batteries determine that its deep charging time does not need 12 hours. 4. Is the rechargeable battery in the best state? The nickel-based battery has the best state, and generally reaches its maximum capacity between 100-200 cycles. Regarding liquid lithium-ion batteries, there is no such a humping phenomenon of cycle capacity. Lithium-ion batteries are not in the best condition. 5. The higher the charging current, the faster the charging. Regarding the charging of lithium-ion batteries, within a certain current range (1.5C-0.5C), increasing the constant current value of the constant current and constant voltage charging method does not shorten the full charge. Li-ion battery time. 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: Analysis of the preservation of lithium-ion batteries