How long is the life of the ternary lithium battery? Detailed explanation of charging times and life of ternary lithium battery.

For traditional batteries, the ternary Lithium Battery has the advantages of long life, energy saving, environmental protection, pollution-free, low maintenance cost, complete charge and discharge, and light weight. Generally speaking, the ternary lithium battery has a long life, so the ternary lithium battery has a long life cycle. How many times is it? How long is the life of the ternary lithium battery?

What is a ternary lithium battery?
Ternary lithium battery refers to a lithium secondary battery that uses three transition metal oxides of nickel, cobalt and manganese as the positive electrode material. It fully integrates the good cycle performance of lithium cobalt oxide, the high specific capacity of lithium nickelate and the high safety and low cost of lithium manganate. It uses molecular level mixing, doping, coating and surface modification methods to synthesize nickel. Cobalt and manganese and other multi-element synergistic composite lithium intercalation oxides. It is a lithium-ion rechargeable battery that is widely researched and applied.

Ternary lithium battery life
The so-called lithium battery life refers to that the capacity of the battery decays to 70% of the nominal capacity (the battery capacity at room temperature 25°C, standard atmospheric pressure, and discharged at 0.2C) after a period of time, which can be considered as the end of life. In the industry, the cycle life of a lithium battery is generally calculated based on the number of cycles when a lithium battery is fully charged. In the process of use, an irreversible electrochemical reaction occurs inside the lithium battery, which leads to a decrease in capacity, such as the decomposition of electrolyte, the deactivation of active materials, the collapse of the positive and negative electrode structure, and the decrease in the number of lithium ions intercalation and deintercalation, etc. . Experiments show that a higher rate of discharge will lead to a faster attenuation of capacity. If the discharge current is lower, the battery voltage will be close to the equilibrium voltage and more energy can be released.

The theoretical life of a ternary lithium battery is about 800 cycles, which is medium among commercial rechargeable lithium batteries. Lithium iron phosphate is about 2,000 cycles, while lithium titanate is said to be able to reach 10,000 cycles. At present, mainstream battery manufacturers promise more than 500 times (charge and discharge under standard conditions) in the specifications of their ternary batteries. However, after the batteries are assembled into a battery pack, due to consistency problems, the main voltage and internal The resistance cannot be exactly the same, and its cycle life is about 400 times.

The manufacturer recommends that the SOC use window is 10%~90%. Deep charging and discharging is not recommended, otherwise it will cause irreversible damage to the positive and negative structure of the battery. If it is calculated by shallow charge and shallow discharge, the cycle life will be at least 1000 times. In addition, if lithium batteries are frequently discharged in high-rate and high-temperature environments, the battery life will be drastically reduced to less than 200 times.