Comparison of real life of lithium ternary and lithium iron phosphate batteries
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2022/08/06 08:59:10
Ternary lithium and lithium iron phosphate battery real life which long? Which has a longer life span, lithium iron phosphate battery pack or ternary lithium battery? Lithium ion battery is divided into ternary lithium battery and lithium iron phosphate battery. The remaining capacity of lithium iron phosphate battery pack is 84% for 5000 cycles and 66% for ternary lithium battery pack for 3900 cycles. In terms of cycle life, the advantages of lithium iron phosphate battery pack are more obvious. Today, Cunneng electric Xiaobian will talk about lithium iron phosphate battery and three yuan 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 the absence of precious metal elements (such as cobalt). Because they do not contain precious metals, the cost of raw materials for lithium iron phosphate battery packs can be compressed very cheaply. 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-manganate lithium as the cathode material, graphite as the cathode material of lithium battery. Unlike lithium iron phosphate, ternary lithium batteries have a high voltage plateau, which means that for the same volume or weight, ternary lithium batteries have more specific energy and power. In addition, in the high rate of charging, and low temperature resistance performance, ternary lithium batteries also have great advantages.
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% is taken as the end point of the test, the current 1C cycle life of the lithium iron phosphate battery laboratory is more than 3500 times, and some of them are up to 5000 times, while the 1C cycle life of the terpolymer lithium battery laboratory is about 2500 times. On the point of cycle life, lithium iron phosphate battery pack is much longer than ternary lithium battery. At the same cycle times, the remaining capacity of lithium iron phosphate battery is much more than that of ternary lithium battery.
The residual capacity of teradic lithium battery is 66% after 3900 cycles, and the residual capacity of lithium iron phosphate battery is 84% after 5000 cycles. The cycle life of teradic lithium battery and lithium iron phosphate battery has obvious advantages.
Theoretically speaking, the life of a ternary lithium battery is 2000 cycles of charging and discharging. We count it as one charge per day, which can also last for more than 5 years. But in practice there is a difference between the use and theory, if 1000 cycles of charging and discharging, the substance of the ternary lithium battery has been attenuated by 50%, that is to say, a full charge can only run half of the original range.
Ternary lithium battery or lithium iron phosphate battery which has a long life?
When the quality of lithium iron phosphate battery is relatively good, the attenuation amount can be controlled within 5% in the first year and 15% in the second year. For the ternary lithium battery type, the first year's decrease is 7-10%, and the second year's decrease is 20-25%. Of course, the specific and use load, use frequency has a relationship, here is just a general statement.
Lithium iron phosphate packs have 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, and the capacity will decay to 60% when it is applied to 1000 times in practice. The real life of lithium iron phosphate battery is 2000 times, at this time there is 95% capacity, the concept of cycle life is more than 3000 times.
Taking various factors into consideration, the service characteristics of lithium iron phosphate battery pack can be roughly expressed as follows: relatively large size, poor low temperature performance, can maintain a relatively gentle decay rate in the life span, generally about 8 years is acceptable; But if you use it in the South. Lithium iron phosphate batteries last a bit longer than eight years.
The difference between lithium iron phosphate battery and ternary lithium battery:
① Comparison of energy density
Lithium iron phosphate battery monomer, energy density is 120Wh/kg, lithium iron phosphate battery pack is 80Wh/kg; The energy density of ternary lithium battery is 180Wh/kg, and the energy density of the battery is 110Wh/kg. From the data point of view, in terms of energy density, teradic lithium batteries are superior to lithium iron phosphate batteries.
② Safety comparison
The liquid electrolyte of ternary lithium battery is flammable and explosive, which is easy to trigger "thermal runaway" during long-term use. The growth of lithium dendrite in the charging and discharging process is easy to puncture the diaphragm, causing battery short circuit and causing safety hazards. 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 aspect
Because lithium iron phosphate batteries do not contain precious metals, the cost of raw materials can be compressed very cheaply. The teradic lithium battery is lithium nickel-cobalt manganate as the positive material, graphite as the negative material of lithium battery, so the cost will be much more expensive than lithium iron phosphate battery.
④ Application field
According to Tram data think tank department data show that the battery of the new energy bus is mainly lithium iron phosphate battery, the bus using lithium manganese acid battery also accounts for a relatively high proportion, and teralithium 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 longer article introduction, hope to help the home. At present, the lithium battery market is mainly lithium iron phosphate battery and ternary lithium battery. Cunneng Electric lithium iron phosphate battery pack has won the trust and recognition of the majority of users by virtue of its numerous advantages.
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