With the promotion of energy saving and environmental protection in society, more and more environmentally friendly products are being used in the market. In the battery industry, ternary lithium batteries have rapidly occupied the market with many advantages and gradually replaced traditional lead-acid batteries. For traditional batteries, ternary lithium batteries have a long life, energy saving and environmental protection, no pollution, low maintenance costs, complete charging and discharging, light weight and other advantages, always say ternary lithium battery life is long, long to what extent?
What is a ternary lithium battery?
In nature, the element lithium is * light, atomic mass * small metal, its atomic weight is 6.94g/mol, ρ = 0.53g/cm3. lithium is chemically active, very easy to lose electrons to be oxidized to Li +, so the standard electrode potential * negative, -3.045V, electrochemical equivalent * small, 0.26g/Ah, these characteristics of the element lithium determines that it is a material with a very These characteristics of lithium element determine that it is a material with high specific energy. Ternary lithium battery refers to the lithium secondary battery using nickel cobalt manganese three transition metal oxides as the cathode material. It fully integrates the good cycle performance of lithium cobaltate, the high specific capacity of lithium nickelate and the high safety and low cost of lithium manganate, and synthesizes the multi-element synergistic composite embedded lithium oxide such as nickel cobalt manganese by using molecular level mixing, doping, coating and surface modification. It is a kind of lithium-ion rechargeable battery which is widely researched and applied at present.
Ternary lithium battery life
The so-called lithium battery life refers to the battery after a period of time, the capacity decay to 70% of the nominal capacity (room temperature 25 ℃, standard atmospheric pressure, and 0.2C discharge battery capacity), can be considered the end of life. The industry generally calculates the cycle life by the number of cycles of lithium battery full and full discharge. In the process of use, irreversible electrochemical reactions will occur inside the lithium battery resulting in a decrease in capacity, such as decomposition of electrolyte, deactivation of active materials, collapse of the positive and negative electrode structure resulting in a reduction in the number of lithium ions embedded and de-embedded, etc. Experiments have shown that higher discharge rates lead to faster capacity decay, and if the discharge current is lower, the cell voltage will be close to the equilibrium voltage and more energy can be released.
The theoretical life of ternary lithium batteries is about 800 cycles, which is medium in the 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, the mainstream battery manufacturers in their production of ternary cells in the specification book promised greater than 500 times (standard conditions charge and discharge), but the cells in the group made into a battery pack, due to consistency issues, mainly voltage and internal resistance is not exactly the same, its cycle life of about 400 times. Manufacturers recommend the use of SOC window of 10% to 90%, it is not recommended for deep charging and discharging, otherwise it will cause irreversible damage to the positive and negative structure of the battery, if the shallow charge and shallow discharge to calculate, the cycle life of at least 1000 times. In addition, if the lithium battery is often discharged at high rates and high temperatures, the battery life will be significantly reduced to less than 200 times.
The number of cycles of lithium battery life is based on the quality of the battery and the battery material to determine.
1, the number of cycles of ternary materials about 800 times.
2, lithium iron phosphate battery cycle times about 2500 times.
3, genuine batteries and defective batteries cycle times are different, genuine batteries are designed and produced according to the number of cycles on the battery manufacturer's specifications, while the number of cycles of defective batteries may sometimes be less than 50 times the side.
Ternary lithium battery life
The so-called lithium battery life refers to the battery in use for a period of time, the capacity decay for the nominal capacity (room temperature 25 ℃, standard atmospheric pressure, and 0.2C discharge battery capacity) of 70%, can be considered the end of life. The industry generally calculates the cycle life by the number of cycles of lithium battery full and full discharge. In the process of use, irreversible electrochemical reactions will occur inside the lithium battery resulting in a decrease in capacity, such as decomposition of electrolyte, deactivation of active materials, collapse of the positive and negative electrode structure resulting in a reduction in the number of lithium ions embedded and de-embedded, etc. Experiments have shown that higher discharge rates lead to faster capacity decay, and if the discharge current is lower, the cell voltage will be close to the equilibrium voltage and more energy can be released.
The theoretical life of ternary lithium batteries is about 800 cycles, which is medium in the 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, the mainstream battery manufacturers in their production of ternary cells in the specification book promised greater than 500 times (standard conditions charge and discharge), but the cells in the group made into a battery pack, due to consistency issues, mainly voltage and internal resistance is not exactly the same, its cycle life of about 400 times. Manufacturers recommend the use of SOC window of 10% to 90%, it is not recommended for deep charging and discharging, otherwise it will cause irreversible damage to the positive and negative structure of the battery, if the shallow charge and shallow discharge to calculate, the cycle life of at least 1000 times. In addition, if the lithium battery is often discharged at a high rate and high temperature, the battery life will be significantly reduced to less than 200 times.
JuiDa lithium long-term manufacturing battery pack, ternary lithium batteries, lithium iron phosphate batteries, lithium iron manganate batteries, lithium ion batteries and so on. The products are applicable to a wide range of high quality, Xin Power is the top-ranked battery brand in China.
Contemporary in today's lithium battery market, ternary lithium batteries are widely used * for a kind of performance in terms of moderate, in terms of price is lower, so the use of ternary lithium batteries cost-effective is *. People always say that ternary lithium batteries have a long life, how long is it in the end? Ternary polymer lithium battery refers to the positive electrode material lithium nickel cobalt manganate (Li (NiCoMn) O2) ternary cathode material lithium battery, ternary composite cathode material precursor products, nickel salt, cobalt salt, manganese salt as raw materials, the ratio of nickel cobalt manganese inside can be adjusted according to actual needs, ternary material as the positive electrode of the battery compared to lithium cobalt acid battery safety, but the voltage is too low, used in cell phones ( Cell phone cut-off voltage is generally around 3.4V) will have a clear sense of insufficient capacity.
Ternary lithium battery performance.
In the capacity and safety of the more balanced materials, cycle performance is better than the normal lithium cobalt acid, the initial technical reasons for its nominal voltage is only 3.5-3.6V, in the use of the scope of limitations, but to date, with the continuous improvement of the formula and structural perfection, the nominal voltage of the battery has reached 3.7V, in the capacity has reached or exceeded the level of lithium cobalt acid.
1, high voltage platform. The voltage platform is an important indicator of battery energy density, which determines the basic efficiency and cost of the battery, and therefore has an important significance for the selection of battery materials. The higher the voltage platform, the greater the specific capacity, certainly the same volume, weight, and even the same ampere-hour battery, the voltage platform is higher than the ternary material lithium battery range farther. Ternary material voltage platform is significantly higher than lithium iron phosphate, high line can reach 4.2 volts, the discharge platform can reach 3.6 or 3.7 volts.
2, high energy density
3, high vibranium density
