Important advantages and maintenance methods of lithium-ion batteries

Important advantages of lithium-ion batteries (1) High voltage: The operating voltage of a single battery is as high as 3.7-3.8v (lithium iron phosphate 3.2v), which is three times that of nickel-cadmium batteries and nickel-h batteries. (2) Greater than energy: the actual specific energy can reach about 555wh/kg at present, that is, the specific capacity of the material can reach more than 150mah/g (3 to 4 times nickel-cadmium, 23 times nickel-manganese batteries), which is close to its theory About 88% of the value. (3) Long cycle life: Generally, it can reach more than 500 times, or even more than 1000 times, and lithium iron phosphate can reach more than 2000 times. Regarding low-current discharge electrical appliances, the battery life will double the competitiveness of electrical appliances. (4) Good safety performance: no pollution and no memory effect. As the predecessor of Li-ion of lithium-ion battery, metal lithium formed by dendritic short circuit is very easy, reducing the application field: Li-ion does not contain cadmium, lead, mercury and other elements in environmental pollution: some processes (such as A big disadvantage of sintered type) Ni-Cd battery has memory effect, it is a serious battery, but Li-ion does not have this problem. (5) Small self-discharge: The self-discharge rate of full lithium ions after storage at room temperature for 1 month is about 2%, which is much lower than 25-30% of nickel-cadmium and 30-35% of nickel-hydrogen. (6) Fast charging and discharging: 1C charging can reach more than 80% of the nominal capacity in 30 minutes, and the ferrophosphorus battery can reach 90% of the nominal capacity in 10 minutes. (7) The working temperature range is large, the working temperature is -25~45℃. With the improvement of electrolyte and positive electrode, it is expected that the operating temperature range will be expanded to -40~70℃. Maintenance manual The charging should not be higher than the maximum charging voltage, and the discharging should not be lower than the minimum working voltage. Lithium-ion batteries must always be kept above the minimum operating voltage. Over-discharge or low-voltage self-discharge reaction will cause the decomposition and destruction of lithium ion active materials, which cannot be reduced. Any overcharging of the lithium-ion battery can cause serious damage or even explosion. Lithium-ion batteries must be protected from overcharging during charging. Do not often deep discharge, deep charge. However, after about 30 charging cycles, the battery detection chip will automatically perform deep discharge and deep charge to accurately assess the state of the battery. Prevent high temperature, light will shorten the life span and cause an explosion in severe cases. If possible, it should be stored in the refrigerator. If the notebook computer uses AC power, please remove the lithium-ion battery strap to prevent the computer from being affected by heat. Prevent freezing, but the freezing point of most lithium-ion battery electrolyte is -40℃, which is not easy to freeze. If you do not use it for a long time, please store it at 40%~60% of the charged capacity. When the battery is too low, it will cause over-discharge due to self-discharge. Since lithium-ion batteries will naturally age when they are not in use, they should be purchased according to the actual number of purchases. It is not advisable to purchase too many. Statement: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete the previous one. Article: Four Misunderstandings of Lithium-ion Battery Maintenance