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What is the actual lifespan of ternary lithium and lithium iron phosphate batteries? Which has a longer lifespan, lithium iron phosphate battery pack or ternary lithium battery? Lithium ion batteries are divided into two types: ternary lithium batteries and lithium iron phosphate batteries. The remaining capacity of the lithium iron phosphate battery pack is 84% after 5000 cycles, and the remaining capacity of the ternary lithium battery pack is 66% after 3900 cycles. In terms of cycle life, the advantages of the lithium iron phosphate battery pack are more obvious. Today, the editor will talk about who has a longer actual lifespan between lithium iron phosphate batteries and ternary lithium batteries.

Lithium iron phosphate battery: refers to a lithium-ion battery that uses lithium iron phosphate as the positive electrode material. The characteristic of this type of battery is that it does not contain precious metal elements (such as cobalt). Due to the absence of precious metal materials, the raw material cost of lithium iron phosphate battery packs can be compressed very low. In practical use, lithium iron phosphate batteries have the advantages of high temperature resistance, strong safety and stability, low cost, and better cycling performance.

Ternary lithium battery: refers to a lithium battery that uses nickel cobalt manganese oxide lithium as the positive electrode material and graphite as the negative electrode material. Unlike lithium iron phosphate, ternary lithium batteries have a high voltage platform, which means that at the same volume or weight, ternary lithium batteries have a higher specific energy and specific power. In addition, ternary lithium batteries also have significant advantages in high rate charging and low temperature resistance.

As a rechargeable lithium battery, ternary lithium batteries have stable output voltage, high output voltage, stable performance, large capacity, long service life, wide operating temperature range, good safety, and environmental friendliness. Therefore, there is great room for improvement in the future development of lithium batteries, but continuous research is needed to improve their own shortcomings.

What is the actual lifespan of ternary lithium and lithium iron phosphate batteries?

If the remaining capacity/initial capacity=80% is used as the end point of the test, the 1C cycle life of the lithium iron phosphate battery laboratory is currently over 3500 times, with some reaching 5000 times, while the 1C cycle life of the ternary lithium battery laboratory is around 2500 times. In terms of the actual lifespan of the cycle, lithium iron phosphate battery packs have a much longer actual lifespan compared to ternary lithium batteries. Under the same number of cycles, the remaining capacity of lithium iron phosphate batteries is also much more than that of ternary lithium batteries.

The remaining capacity of ternary lithium batteries after 3900 cycles is 66%, while that of lithium iron phosphate batteries after 5000 cycles is 84%. The cycle life is significantly better than that of ternary lithium batteries and lithium iron phosphate batteries.

In theory, the lifespan of ternary lithium batteries is 2000 charge and discharge cycles, which can be considered as one charge per day and can last for over 5 years. However, there is still a difference between actual use and theory. If 1000 charge and discharge cycles are conducted, the ternary lithium battery has essentially decayed by 50%, which means that it can only run half of the original mileage when fully charged.

Which has a longer lifespan, ternary lithium batteries or lithium iron phosphate batteries?

When the quality of lithium iron phosphate batteries is relatively good, the attenuation in the first year can be controlled within 5%, and in the second year it can be controlled within 15%. For ternary lithium battery types, the first year saw a decrease of 7-10%, and the second year saw a decrease of 20-25%. Of course, it also depends on the usage load and frequency, and this is just a rough description.

The cycle life of lithium iron phosphate battery packs is longer than that of lead-acid batteries and ternary lithium batteries. The "long lifespan" of lead-acid batteries is only about 300 times; The theoretical capacity of ternary lithium batteries can reach 2000 cycles, but in practical applications, the capacity will decay to 60% after about 1000 cycles; And the actual lifespan of lithium iron phosphate batteries reaches 2000 cycles, with 95% capacity at this time, and their conceptual cycle life can reach more than 3000 cycles.

Taking into account various factors, the usage characteristics of lithium iron phosphate battery packs can be roughly described as follows: relatively large size, poor low-temperature performance, and the ability to maintain a relatively gentle decay rate during the lifespan, which is generally acceptable for around 8 years; But if used in the south. The lifespan of lithium iron phosphate batteries is even longer than 8 years.

The difference between lithium iron phosphate batteries and ternary lithium batteries:

① Energy density comparison

Lithium iron phosphate battery monomer, with an energy density of 120Wh/kg, and a lithium iron phosphate battery pack of 80Wh/kg; The energy density of a single ternary lithium battery is 180Wh/kg, and after grouping, the energy density is 110Wh/kg. From a data perspective, in terms of energy density, ternary lithium batteries are superior to lithium iron phosphate batteries.

② Security comparison

The liquid electrolyte of ternary lithium batteries is flammable and explosive, which can easily trigger thermal runaway during long-term use. The growth of lithium dendrites during charging and discharging can easily puncture the separator, causing battery short circuits and posing safety hazards. And lithium iron phosphate battery packs have the advantages of high temperature resistance, strong safety and stability, and better cycling performance in practical use.

③ In terms of cost

Due to the absence of precious metal materials in lithium iron phosphate batteries, the raw material cost can be compressed very low. And ternary lithium batteries use nickel cobalt manganese lithium as the positive electrode material and graphite as the negative electrode material, so the cost is much higher than that of lithium iron phosphate batteries.

④ Application field

According to data from the Tramway Data Think Tank Department, the batteries used in new energy buses are mainly lithium iron phosphate batteries, and buses using lithium manganese oxide batteries also account for a relatively high proportion. Ternary lithium batteries have become the preferred commercial choice for passenger cars due to their advantages.

Through the above article's introduction to which is the longer true lifespan of ternary lithium batteries and lithium iron phosphate, I hope it is helpful for home use. At present, the lithium battery market is mainly dominated by lithium iron phosphate batteries and ternary lithium batteries. The lithium iron phosphate battery pack has won the trust and recognition of a large number of users with its numerous advantages.

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