Which one is better, lithium ion battery or lithium iron phosphate battery?

Lithium batteries and lithium iron phosphate batteries has their own advantages.

Lithium iron phosphate monomer has typical voltage of 3.2 V, while lithium ion is 3.7 V.

Resistance to overcharge lithium iron phosphate discharge, short on 0 can recover more than 80%.Lithium ions into the 2.6 V will produce irreversible damage.

Resistance to overcharge lithium iron phosphate to 100% will not fire explosion. Lithium ions over 4.35 V will air ballooning.

Lithium iron phosphate puncture not fire explosion. Lithium ions.(now relatively safer)

Resistance to high temperature lithium iron phosphate, and more than 200 degrees can also be used after recovery.

Can high discharge current lithium iron phosphate, more than 10 c20c can, lithium ion can only 3 ~ 5 c discharge

The above, the lithium iron phosphate is one of the safest in the lithium battery.

However, the energy density of lithium iron phosphate is smaller than that of lithium ion battery. Voltage is also relatively lower. Because of its large discharge characteristic, mainly use power source, such as electric cars, model aircraft, etc. And large capacity of lithium ion, consumption is mainly used for civilian use. So look for in what respect the choice of the different batteries

Lithium iron phosphate batteries: refers to the use of lithium iron phosphate as the anode material of lithium ion batteries. Its characteristic is do not contain the valuable elements such as cobalt, raw material prices are low and phosphor, iron exists in the earth's resources abundant, there would be no problem of feeding. Its working voltage (3.2 V), moderate large capacitance under unit weight (170 mAh/g), high discharge power, can fast charge, long cycle life, high stability under high temperature and high temperature environment.

Advantages:

Currently on the market more than common and cobalt acid lithium manganese acid lithium batteries, lithium iron phosphate batteries at least has the following five advantages: higher safety, longer service life, does not contain any heavy metals and rare metals (low) cost of raw materials, support rapid charging, wide working temperature range.

Disadvantages:

Lithium iron phosphate has some defects on the performance, such as low tap density and compaction density, leading to a lower energy density of lithium ion batteries; The preparation of material cost and battery manufacturing cost is higher, battery low yield, poor consistency; Poor product consistency; Intellectual property rights.

The so-called batteries, lithium iron phosphate is refers to the use of lithium iron phosphate as the anode material of lithium ion batteries. The characteristics of this kind of battery is not including precious metal elements (such as cobalt, etc.).Because do not contain precious metal materials, the cost of raw materials of lithium iron phosphate battery can be compressed very cheap. In actual use, lithium iron phosphate battery with high temperature resistance, stability is strong, cheap, circulating the advantage of better performance.

The ternary lithium battery is refers to the use of nickel cobalt manganese acid lithium as the anode material, graphite as the cathode material of lithium battery. Unlike the lithium iron phosphate, ternary lithium battery voltage platform is very high, which means under the same volume or weight, ternary lithium battery than power, greater than power. In addition, in the big charge ratio, and low temperature resistance, etc., the ternary lithium battery also has a great advantage.

I've always thought, technology is not good or bad, or, or only applicable to different product or environment. Theory of single cell, also do not have the so-called less who is better. Only apply to the actual use scenario, three yuan compared to lithium iron phosphate batteries, lithium-ion batteries more adapt to the present and future of household electric cars.

For a family car, and ternary material lithium iron phosphate power battery rated cycle life are far more than the actual user habits and so on the service life can be at ease completely. With bak battery current high capacity battery 18650, for example, in the charge and discharge cycle after 1000, more than 90% of the battery capacity can still keep in the original. Because the author itself is the electric car owners, only the coldest winter of more than 1 months for the whole year, frequent charging when opening the warm wind to reach 2 days, the rest of the time the basic charge 3-4 days. Assume that charging to calculate an average of 3 days all the year round, need to use 1 year of about 6 times, cycle life about eight years to 1000 times after use, it also basic at present, more than the average consumer to change cycle.

Five, the safe enough material and process

Hardest part of the traditional internal combustion engine car is contains the huge energy of the fuel, ignition point or explosive of low liquid fuels like gasoline once leak is very easy to cause great potential safety hazard. Power battery and new energy vehicles, after complete battery management system (BMS) monitoring, each battery can get the most accurate control, preventing accidents.

The ternary polymer lithium battery: the anode materials using nickel cobalt manganese acid lithium (Li (NiCoMn) O2) ternary cathode material of lithium battery. According to Tsinghua university Ming-gao Ouyang explains: the survey of "three yuan" referred to in the material, three yuan is refers to the anode, the cathode is the usual claims of graphite in the "three yuan power battery". In practical application in the research and development, and three yuan is a kind of positive, negative is lithium titanate, commonly referred to as "lithium titanate", its performance is safety, long service life, does not belong to common says "ternary material."

The ternary lithium battery energy density is high, the cycle performance is better than normal cobalt acid lithium. At present, as incremental improvements were made in the formulation and perfect structure, nominal voltage of battery is 3.7 V, on the capacity has been reached or exceed cobalt acid lithium battery level.

Disadvantages:

Ternary material power lithium batteries are mainly aluminum nickel and cobalt acid lithium batteries, nickel cobalt manganese acid lithium battery, etc., due to the high temperature structure of the aluminum nickel and cobalt is not stable, lead to high temperature and poor safety, and high pH make the monomer easily bilge gas, causing danger, the cost is higher.

Conclusion: in contrast, ternary polymer lithium battery have a more superior characteristics than lithium iron phosphate battery, but now with the development of new energy, the ternary polymer lithium-ion battery is better.

The page contains the contents of the machine translation.