How many times is the life cycle of ternary lithium battery?

With the promotion of energy conservation and environmental protection in society, more and more eco-friendly products are being introduced into the market. In the Lithium Polymer Battery industry, ternary Lithium Battery has quickly occupied the market with many advantages and gradually replaced the traditional Lead acid battery. For traditional batteries, ternary Lithium Batteries have the advantages of long life, energy saving and environmental protection, low maintenance cost, complete charge and discharge, light weight, etc., always say that ternary lithium batteries have long life, to what extent?

With the promotion of energy saving and environmental protection in the society, more and more environmentally friendly products are applied in the market. In the battery industry, ternary lithium batteries quickly occupied the market with many advantages and gradually replaced traditional Lead Acid Batteries. For traditional batteries, ternary lithium batteries have the advantages of long life, energy saving and environmental protection, low maintenance cost, complete charge and discharge, light weight, etc., always say that ternary lithium batteries have long life, to what extent?

Ternary Lithium Battery

What is a Ternary Lithium Battery?

In nature, lithium is the lightest and smallest metal with an atomic weight of 6.94g/mol and ρ=0.53g/cm3. Lithium chemical properties are active, it is easy to lose electrons to be oxidized to Li+, so the standard electrode potential is negative, is -3.045V, the electrochemical equivalent is small, is 0.26g/Ah, these characteristics of lithium determines that it is a material with a very high specific energy. Ternary lithium battery refers to the lithium secondary battery using three transition metal oxides of nickel, cobalt and manganese as positive electrode materials. It fully synthesizes the good cycling performance of lithium cobaltate, the high specific capacity of lithium nickelate, and the high safety and low cost of lithium manganate, and uses molecular-level mixing, doping, coating and surface modification methods to synthesize nickel-cobalt-manganese and other multi-element synergistic compound lithium-embedded oxides. It is a kind of lithium-ion rechargeable battery that is currently being widely studied and applied.

Ternary Lithium Battery Life

The so-called lithium battery life refers to the battery after use for a period of time, the capacity decay to the nominal capacity (room temperature 25℃, standard atmospheric pressure, and 0.2C discharge battery capacity) 70%, you can consider the end of life. In the industry, the cycle life of lithium batteries is generally calculated by the number of cycles of full discharge. In the process of use, irreversible electrochemical reactions will occur inside the lithium battery, leading to a decrease in capacity, such as decomposition of the electrolyte, inactivation of the active material, and collapse of the positive and negative electrode structures, leading to a reduction in the number of lithium ion embedding and deembedding.

The theoretical life of ternary lithium batteries is about 800 cycles, which is average for commercial rechargeable lithium batteries. Lithium iron phosphate is about 2,000 cycles, while lithium titanate is said to reach 10,000 cycles. At present, the mainstream battery manufacturers promise more than 500 times in the ternary cell specifications they produce (charge and discharge under standard conditions), but after the cell is made into a battery pack, due to consistency problems, especially the voltage and internal resistance may not be exactly the same, and its cycle life is about 400 times. The manufacturer recommends that the SOC usage window is 10% to 90%, it is not recommended to carry out deep charge and discharge, 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 is at least 1000 times. In addition, if the lithium battery is frequently discharged in a high rate and high temperature environment, the battery life will be significantly reduced to less than 200 times.

In today's lithium battery market, ternary lithium battery is the most widely used, moderate in performance, low in price, so the use of ternary lithium battery cost performance is the best. People always say that ternary lithium battery life is long, how long is it? Ternary polymer lithium battery refers to the positive electrode material with nickel cobalt manganese oxide lithium (Li (NiCoMn) O2) ternary cathode material lithium battery, ternary composite cathode material precursor products, nickel salt, cobalt salt, manganese salt as raw materials, the proportion of nickel cobalt manganese can be adjusted according to actual needs, ternary material as a positive electrode battery relative to lithium cobalt acid battery safety is high. However, the voltage is too low, and the phone (the cut-off voltage of the phone is generally about 3.4V) will have a significant sense of insufficient capacity.

Ternary lithium battery performance:

In terms of capacity and safety more balanced materials, cycle performance is better than normal lithium cobalt oxide, due to technical reasons in the early stage of its nominal voltage is only 3.5-3.6V, in the scope of use is limited, but so far, with the continuous improvement of the formula and structure, the nominal voltage of the battery has reached 3.7V, in terms of capacity has reached or exceeded the level of lithium cobalt oxide battery.

1. High voltage platform. The voltage platform is an important indicator of the battery energy density, which determines the basic efficiency and cost of the battery, so the selection of battery materials is of great significance. The higher the voltage platform, the larger the specific capacity, and certainly the same volume, weight, and even the same ampere-hour battery, the voltage platform is longer than the high ternary material lithium battery. The voltage platform of the ternary material is significantly higher than that of lithium iron phosphate, the high line can reach 4.2 volts, and the discharge platform can reach 3.6 or 3.7 volts.

2, high energy density

3, high vibration density