With the promotion of energy conservation and environmental protection, more and more environmentally friendly products are being applied to the market. In the battery industry, ternary lithium batteries with many advantages quickly occupied the market, and gradually replace the traditional lead-acid batteries. For the traditional battery, ternary lithium batteries have a long life, energy-saving and environmental protection without pollution, low maintenance costs, charge and discharge completely, lightweight, and so on, the total ternary lithium battery life, how long it will be?
What is a ternary lithium battery?
In nature, lithium is the lightest metal with the smallest atomic mass. Its atomic weight is 6.94g/mol and ρ=0.53g/cm3. Lithium is chemically active and easily loses electrons and is oxidized to Li+. Therefore, the standard electrode potential is the most negative, -3.045V, and the electrochemical equivalent is the smallest, 0.26g/Ah. These characteristics decide that it is a material with high specific energy. Ternary lithium battery refers to the lithium secondary battery that uses three transition metal oxides of nickel-cobalt-manganese as the cathode material. It fully integrates the good cycling performance of lithium cobaltate, the high specific capacity of lithium nickelate, and the high safety and low cost of lithium manganate, which synthesizes nickel-cobalt-manganese and other multi-element synergistic lithium-embedded oxide by molecular level mixing, doping, coating, and surface modification methods. The ternary lithium battery is a kind of lithium-ion rechargeable battery that is widely researched and applied at present.
The life of ternary lithium battery
The so-called lithium battery life refers to capacity decay of nominal capacity with a period of battery use ( at room temperature 25 ℃, standard atmospheric pressure, and discharge at 0.2C)
can be considered the end of life. In the industry, the cycle life is generally calculated by the number of cycles of full charge and discharge of lithium batteries. 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 the electrolyte, the deactivation of active materials, the collapse of the positive and negative structures, and the reduction in the number of lithium ions inserted and extracted. Experiments have shown that a higher discharge rate 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.
Life of ternary lithium battery
The theoretical life of a ternary lithium battery is about 800 cycles, which is medium among commercially rechargeable lithium batteries. Lithium iron phosphate is about 2,000 cycles, while lithium titanate is said 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 battery cells. Manufacturers recommend that the SOC use window is 10%~90%. Deep charging and discharging are 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 the lithium battery is often discharged under high rate and high-temperature environment, the battery life will be greatly reduced to less than 200 times
The number of life cycles of lithium batteries is based on battery quality and battery materials.
- The cycle times of ternary materials are about 800 times.
- Lithium iron phosphate battery is cycled about 2500 times.
Grepow has long been manufacturing battery packs, ternary lithium batteries, lithium polymer batteries, lithium iron phosphate batteries, and so on. The product has a wide range of applications and high quality. Grepow is the world’s top battery manufacturer, which was founded in 1998, over 20 years of experience in battery manufacturing. There are currently 3 self-owned brands “格氏 ACE”, “GENS ACE” and “TATTU”.
In today’s lithium battery market, ternary lithium batteries are the most widely used. They are moderate in terms of performance and low in price. Therefore, the ternary lithium batteries are the most cost-effective.