What is the lifespan of a ternary lithium battery?
Based on current ternary lithium battery technology, if used properly, it can last at least 5 years in electric vehicles. However, if used improperly, the lithium battery's lifespan will be exhausted in 2-3 years.
Whether it is used properly or not depends mainly on whether the principle of shallow filling and shallow dispensing is followed, and whether it is overused.
Power lithium-ion batteries can have a lifespan of up to 2000 cycles, and battery management systems can limit overcharging and over-discharging. How long is the lifespan of lithium batteries currently? Many factors determine the lifespan of power lithium-ion batteries, including the characteristics of the battery system itself, as well as manufacturing processes and operating conditions. A high-quality battery system, coupled with scientific system management, can achieve a very long lifespan.
What are the advantages and disadvantages of ternary lithium batteries?
Advantages of ternary lithium batteries:
1. High energy density, exceeding 200Wh/kg; high voltage plateau. Voltage plateau is a crucial indicator of battery energy density, determining its basic performance and cost, and therefore significantly impacting the selection of battery materials. A higher voltage plateau results in greater specific capacity, meaning that for batteries of the same volume, weight, and even ampere-hour capacity, ternary lithium batteries with a higher voltage plateau will have a longer driving range.
Disadvantages of ternary lithium batteries:
Low output efficiency: Tesla uses NCR18650A type batteries with a typical capacity of 3070mAh. The continuous discharge current can only reach 2C, and the discharge effect is best at 2C.
Rapid capacity decay and short lifespan: The batteries used in Tesla cars, under the same charge and discharge current, will have their capacity decay to 55% after 900 cycles from 0% to 100%. However, if they are cycled from 0% to 50% each time, they can still maintain 70% capacity even after 3000 cycles.
Poor safety: Regardless of the brand, ternary lithium batteries will produce open flames when they are short-circuited internally or when the positive electrode material comes into contact with water. Even though 18650 batteries are protected by a steel shell, they still cannot withstand extreme impacts.
The elements are toxic (the temperature of ternary lithium batteries rises sharply after high-power charging and discharging, and the oxygen released at high temperatures is extremely easy to burn).
The biggest advantage of ternary lithium batteries is their relatively high energy density compared to lithium iron phosphate batteries. However, a significant drawback of ternary lithium batteries is their low ignition point when exposed to impacts or high temperatures. Therefore, ternary lithium batteries require stringent protection measures to prevent accidents.
