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Ternary material lithium ion battery classification and ternary lithium battery use method

Ternary lithium-ion batteries refer to lithium-ion batteries that use three transition metal oxides of nickel, cobalt, and manganese as cathode materials. Compared with lithium iron phosphate batteries, ternary lithium-ion batteries have more average overall performance and higher energy density. high, the volume specific energy is also higher. Because it combines the advantages of lithium cobaltate, lithium nickelate and lithium manganate, its performance is better than any of the above single-component cathode materials.

Ternary material lithium ion battery classification and ternary lithium battery use method

Ternary material lithium ion battery classification

1. Ternary polymer lithium-ion battery

Ternary polymer lithium-ion battery refers to a lithium-ion battery that uses nickel cobalt lithium manganate (Li(NiCoMn)O2) ternary positive electrode material and gel polymer electrolyte as the positive electrode material. As a transport medium for ion movement, electrolyte is generally composed of solvent and lithium salt. The electrolyte of lithium secondary battery mainly includes liquid electrolyte, ionic liquid electrolyte, solid polymer electrolyte and gel polymer electrolyte. Its greatest advantage is the high mechanical strength of the membrane and the large surface area provided by the membrane. The thinner the film, the higher the energy density because more active species can be embedded in the battery.

2. Ternary power lithium-ion battery

The so-called power ternary lithium-ion battery means that the battery supports high-rate and high-current discharge, has high power density, and releases more energy per unit time. The rate discharge capability refers to the ability to maintain the battery capacity when the charge and discharge rate is increased. The rate of charge and discharge is represented by xC, 1C means that the nominal capacity of the battery can be used up in 1h, while the rate of discharge at 2C can be used for 30min.

For the ternary power lithium-ion battery, the one with the most research and the most mature technology is Japan's Panasonic Corporation, which can achieve 30C discharge in the experimental stage, among which the power-type 18650 ternary lithium-ion battery has been successfully commercialized and mass-produced. The discharge rate can reach 12C, and the capacity is also as high as 3300mAh.

3. Ternary low temperature lithium-ion battery

The low-temperature characteristics of lithium-ion batteries are mainly examined from the low-temperature discharge characteristics and cycle life. The most important thing for low-temperature batteries is to maintain the fluidity of materials under low temperature conditions, so that lithium ions can freely shuttle between the positive and negative electrodes to realize the charging and discharging of the battery. . At present, ternary lithium-ion battery manufacturers at home and abroad can basically achieve a discharge temperature of -20 degrees, and the discharge capacity is greater than 50%, and the cycle life is about 400 times, which can fully meet the needs of ordinary electrical appliances and power consumption scenarios. However, in special aerospace, special equipment and other special products, or in severe cold environments such as northern and high mountains, lithium-ion batteries must be able to achieve lower discharge operating temperatures to meet harsh operating conditions.

How to use the ternary lithium-ion battery correctly

1. If the ternary lithium-ion battery is not used for a long time, it is best to charge it with about 40% of the power and store it at a temperature of 10~30 °C, and replenish it every six months or so;

2. With the matching charger, after the ternary lithium-ion battery is fully charged, it is enough to charge it for an hour;

3. Since the safety of lithium-ion batteries is relatively low and they are more sensitive to the temperature in the environment, we should pay more attention to the temperature of the environment when using lithium-ion batteries. 40 degrees Celsius to 60 degrees Celsius is the best temperature for lithium-ion batteries.



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