Ternary lithium and lithium iron phosphate battery real life which long? Ternary lithium battery and iron phosphate lithium battery which long life? Lithium ion batteries are divided into ternary lithium batteries and lithium iron phosphate batteries. The remaining capacity of lithium iron phosphate battery pack is 84% after 5000 cycles, and the remaining capacity of lithium iron phosphate battery pack is 66% after 3900 cycles. In terms of cycle life, the advantages of lithium iron phosphate battery pack are more obvious. Today, we will talk about iron phosphate lithium battery and ternary lithium battery who has a longer real life.
Lithium iron phosphate battery: refers to the lithium ion battery which uses lithium iron phosphate as the cathode material. This type of battery is characterized by the absence of precious metal elements (such as cobalt). Because it does not contain precious metals, the raw material cost of lithium iron phosphate battery packs can be compressed very low. In practical use, lithium iron phosphate battery has the advantages of high temperature resistance, safety and stability, low price and better cycle performance.
Ternary lithium battery: it refers to the lithium battery that uses lithium nickel-cobalt manganese oxide as the cathode material and graphite as the cathode material. Unlike lithium iron phosphate, ternary lithium battery voltage platform is very high, which means that in the same volume or weight, ternary lithium battery specific energy, specific power is greater. In addition, in terms of high rate charging, and low temperature resistance, 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 lithium iron phosphate battery laboratory is more than 3500 times, and some reaches 5000 times, while the 1C cycle life of three yuan lithium battery laboratory is about 2500 times. At the point of cycle life, the real life of lithium iron phosphate battery pack is much longer than that of 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 remaining capacity of ternary lithium battery is 66% after 3900 cycles, and the remaining capacity of lithium iron phosphate battery is 84% after 5000 cycles. The cycle life of ternary lithium battery is significantly better than that of lithium iron phosphate battery. Theoretically speaking, the ternary lithium battery life is 2000 charge and discharge cycles, we count as a day charge, can also last more than five years. In practice, however, there is a difference between theory and use. If 1000 charge and discharge cycles are carried out, in essence, the ternary lithium battery has fallen by 50%, which means that the full charge can only run half of the original range.
Ternary lithium battery and iron phosphate lithium battery which long life?
Under the condition that the quality of lithium iron phosphate battery is relatively good, the attenuation can be controlled within 5% in the first year and 15% in the second year. For ternary lithium battery types, the drop was 7-10% in the first year and 20-25% in the second. Of course, the specific and the use of load, the use of frequency, here is only a general statement. Lithium iron phosphate packs have a longer cycle life than both lead-acid and ternary lithium batteries. The "long life" of lead-acid batteries is only about 300 times; Ternary lithium battery can reach 2000 times in theory, and the capacity will decline to 60% when applied to about 1000 times in practice; The real life of lithium iron phosphate battery is 2000 times, at this time there are 95% capacity, its concept cycle life is more than 3000 times. Taking into account a variety of factors, the use characteristics of lithium iron phosphate battery pack can be roughly expressed as: relatively large size, low temperature performance is not good, can maintain a relatively gentle attenuation rate in the life period, generally used for about 8 years is ok; But if you use it in the South. Lithium iron phosphate batteries can last a little longer than eight years.
The difference between lithium iron phosphate battery and ternary lithium battery:
① Energy density comparison
The energy density of lithium iron phosphate battery is 120Wh/kg and the energy density of lithium iron phosphate battery is 80Wh/kg. The energy density of ternary lithium battery is 180Wh/kg, and the energy density of group is 110Wh/kg. From the point of view of data, in terms of energy density, ternary lithium battery is better than 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" during long-term use. In the process of charging and discharging, the growth of lithium dendrite is easy to Pierce the diaphragm, causing short circuit in the battery and causing safety risks. In practice, lithium iron phosphate battery packs have the advantages of high temperature resistance, strong safety and stability, and better cycling performance.
Since lithium iron phosphate batteries do not contain precious metals, the cost of raw materials can be squeezed very low. And ternary lithium battery is lithium nickel cobalt manganese oxide as the cathode material, graphite as the cathode material of lithium battery, so the cost will be much more expensive than lithium iron phosphate battery.
④ Application field
According to the tram data collection think tank department data shows that the new energy bus battery is mainly lithium iron phosphate battery, the use of lithium manganese acid battery bus also accounts for a relatively high, and three yuan lithium battery because of its advantages become the first choice for passenger car commercialization.