Ternary lithium and lithium iron phosphate battery life comparison
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2022/05/26 15:21:42
Ternary lithium and lithium iron phosphate battery real life which long? Which lithium iron phosphate battery pack or lithium ternary battery life longer? Lithium ion battery is divided into two types: ternary lithium battery and lithium iron phosphate battery. Lithium iron phosphate battery pack has a residual capacity of 84% for 5000 cycles, and lithium iron phosphate battery pack has a residual capacity of 66% for 3900 cycles. Compared with the cycle life, lithium iron phosphate battery pack has a more obvious advantage. Today, save energy electric xiaobian to talk about iron phosphate lithium battery and ternary lithium battery whose real life is longer.
Lithium iron phosphate battery: refers to the lithium ion battery with lithium iron phosphate as the cathode material. This type of battery is characterized by no precious metal elements (such as cobalt). The raw material cost of lithium iron phosphate battery packs can be compressed very cheaply because they contain no precious metals. In practical use, lithium iron phosphate battery has the advantages of high temperature resistance, strong safety and stability, low price and better cycle performance.
Ternary lithium battery: refers to the use of nickel cobalt manganese lithium as the cathode material, graphite as the cathode material of lithium battery. Different from lithium iron phosphate, ternary lithium batteries have a high voltage platform, which means that the specific energy and power of ternary lithium batteries are greater for the same volume or weight. In addition, ternary lithium batteries also have great advantages in large charging rate and low temperature resistance.
As lithium battery charging, the ternary lithium battery output voltage stability, high output voltage, stable performance, large capacity, long service life, wide working temperature range, good safety and environmental protection free from contamination, so in the future development of lithium-ion batteries has a big rise in space, but also need to constantly research in order to achieve the purpose of improving its own defects.
Ternary lithium and lithium iron phosphate battery real life which long?
If the remaining capacity/initial capacity =80% as the end point of the test, the current 1C cycle life of lithium iron phosphate battery laboratory is more than 3500 times, and part of it reaches 5000 times, while the 1C cycle life of terpolymer lithium battery laboratory is about 2500 times. On the point of cycle life, the life of lithium iron phosphate battery pack is much longer than that of ternary lithium battery. In the same number of cycles, the residual capacity of lithium iron phosphate battery is much more than that of ternary lithium battery.
The residual capacity of ternary lithium battery is 66% for 3900 cycles, and the residual capacity of lithium iron phosphate battery is 84% for 5000 cycles. The cycle life of lithium iron phosphate battery is obviously superior to that of ternary material lithium battery.
In theory, ternary lithium battery life is 2,000 charge and discharge cycles, we count one charge a day, also can last more than five years. But in fact, there is a difference between the use and the theory. If the charge and discharge cycle is carried out for 1000 times, essentially the three-yuan lithium battery has been attenuated by 50%, that is to say, it can only run half of the original mileage when fully charged.
If the quality of lithium iron phosphate battery is good, the attenuation can be controlled within 5% in the first year and 15% in the second year. Ternary lithium battery type, the first year in 7-10%, 20-25% in the second year. Of course, specific and use load, use frequency has a relationship, here is only a general statement.
The lithium iron phosphate battery pack has a longer cycle life than both lead-acid and ternary lithium batteries. The "long life" in lead-acid batteries is only about 300 times; Ternary lithium battery can be up to 2000 times in theory, the actual application of 1000 times or so the capacity will decay to 60%; The real life of lithium iron phosphate battery is 2000 times, at this time there is still 95% capacity, and its conceptual cycle life is more than 3000 times.
Comprehensive factors, the use characteristics of lithium iron phosphate battery pack can be roughly described as: relatively large size, low temperature performance is not good, can maintain a relatively gentle decay rate during the life cycle, generally with about 8 years is ok; But if you use it in the South. Lithium-iron phosphate batteries last a little longer than eight years.
Differences between lithium iron phosphate battery and ternary lithium battery:
① Comparison of energy density
Lithium iron phosphate cell, energy density of 120Wh/kg, lithium iron phosphate battery pack of 80Wh/kg; Ternary lithium battery monomer, energy density of 180Wh/kg, group energy density of 110Wh/kg. In terms of energy density, ternary lithium battery is superior to lithium iron phosphate battery.
② Safety comparison
The liquid electrolyte of ternary lithium battery is flammable and explosive, which is easy to trigger "thermal runaway" in the long-term use process. The growth of lithium dendrite is easy to Pierce the diaphragm in the charging and discharging process, resulting in short circuit of the battery, resulting in safety risks. The lithium iron phosphate battery pack has the advantages of high temperature resistance, strong safety and stability, and better cycling performance in practical use.
③ Cost
Because lithium iron phosphate batteries contain no precious metals, the cost of raw materials can be compressed very cheaply. Ternary lithium battery is lithium nickel-cobalt-manganate as anode material, graphite as anode material of lithium battery, so the cost will be much more expensive than lithium iron phosphate battery.
④ Application field
According to the data of the trolley Data think tank department, the battery of the new energy bus is mainly lithium iron phosphate battery, and the bus using lithium manganese acid battery also accounts for a relatively high proportion, while the three lithium battery has become the first choice for passenger car commercialization because of its advantages.
Through the above article on the ternary lithium battery and lithium iron phosphate battery real life which is the longer article, I hope to help home. At present, the lithium battery market, mainly to lithium iron phosphate battery and ternary lithium battery. Energy storage electric lithium iron phosphate battery pack by virtue of its own numerous advantages to win the trust and recognition of the majority of users.
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