The difference between lithium iron phosphate batteries and
18650 lithium batteries. With the increasing application of lithium batteries, more and more products are using lithium batteries. Iron phosphate batteries and 18650 lithium batteries are two common types of batteries. 18650 lithium battery is a commonly used lithium battery in electronic products, often used as a battery cell in laptop batteries. Lithium iron phosphate batteries are generally used in power batteries, and this article will elaborate on the differences between the two.
Lithium iron phosphate battery:
It refers to lithium-ion batteries that use lithium iron phosphate as the positive electrode material. The positive electrode materials of lithium-ion batteries mainly include lithium cobalt oxide, lithium manganese oxide, lithium nickel oxide, ternary materials, lithium iron phosphate, etc. Lithium cobalt oxide is currently the majority of positive electrode materials used in lithium-ion batteries. Due to its performance being particularly suitable for power applications, the word "power" is added to the name, namely lithium iron phosphate power battery. Some people also refer to it as a lithium iron (LiFe) power battery.
Advantages of lithium iron phosphate batteries:
1. Lithium iron phosphate batteries have a long lifespan, with a cycle life of over 2000 times. Under the same conditions, lithium iron phosphate batteries can be used for 7 to 8 years.
2. Use safely. Lithium iron phosphate batteries undergo strict safety testing and will not explode even in traffic accidents.
3. Fast charging. Using a dedicated charger, the battery can be fully charged after 40 minutes of charging at 1.5C.
4. Lithium iron phosphate batteries are resistant to high temperatures, and the hot air value of lithium iron phosphate batteries can reach 350 to 500 degrees Celsius.
5. Lithium iron phosphate batteries have a large capacity.
6. Lithium iron phosphate batteries have no memory effect.
7. Lithium iron phosphate batteries are environmentally friendly, non-toxic, pollution-free, with a wide range of raw material sources and affordable prices.
Lithium iron phosphate battery: currently one of the most promising positive electrode materials for lithium batteries, with relatively high theoretical capacity, low price, good thermal stability, no pollution, and excellent charge discharge cycle performance. The process requirements are extremely strict, as power batteries are generally composed of multiple batteries connected in series and parallel, so the consistency requirements for individual batteries are extremely high.
18650 lithium battery:
18650 is the pioneer of lithium-ion batteries - a standard lithium-ion battery model established by Sony Corporation in Japan to save costs, where 18 represents a diameter of 18mm, 65 represents a length of 65mm, and 0 represents a cylindrical battery.
The common 18650 batteries are divided into lithium-ion batteries and lithium iron phosphate batteries. Lithium ion batteries have a nominal voltage of 3.7V and a charging cut-off voltage of 4.2V. Lithium iron phosphate batteries have a nominal voltage of 3.2V and a charging cut-off voltage of 3.6V, with a typical capacity of 1200mAh-3350mAh and a common capacity of 2200mAh-2600mAh.
Advantages of 18650 lithium battery:
1. Large capacity: The capacity of 18650 lithium batteries is generally between 1200mAh and 3600mAh, while the capacity of general batteries is only about 800. If 18650 lithium batteries are combined to form an 18650 lithium battery pack, it can easily exceed 5000mAh.
2. Long lifespan: 18650 lithium batteries have a long service life, with a normal cycle life of over 500 times, which is more than twice that of ordinary batteries.
3. High safety performance, 18650 lithium battery has high safety performance, no explosion, no combustion; Non toxic, pollution-free, certified with RoHS trademark; All kinds of safety performance are achieved in one go, with more than 500 cycles; Good high temperature resistance, with a discharge efficiency of 100% at 65 degrees Celsius. To prevent battery short circuits, the positive and negative poles of 18650 lithium batteries are separated. So the possibility of it experiencing a short circuit has been reduced to the extreme. Protective plates can be installed to prevent overcharging and overdischarging of the battery, which can also extend its lifespan.
4. High voltage: The voltage of 18650 lithium batteries is generally 3.6V, 3.8V, and 4.2V, much higher than the 1.2V voltage of nickel cadmium and nickel hydrogen batteries.
Which is better, lithium iron phosphate battery or 18650 battery?
Lithium iron phosphate batteries are better than 18650 lithium batteries.
Lithium iron phosphate as a lithium battery material has only emerged in recent years, and the development of high-capacity lithium iron phosphate batteries in China began in July 2005. Its safety performance and cycle life are incomparable to other materials, which are also the most important technical indicators of power batteries. The cycle life of 1C charging and discharging reaches 2000 times. A single battery with an overcharge voltage of 30V does not burn or explode when punctured. Lithium iron phosphate battery cathode materials make high-capacity lithium-ion batteries easier to use in series. To meet the frequent charging and discharging needs of electric vehicles. It has the advantages of non-toxic, pollution-free, good safety performance, wide source of raw materials, low price, and long service life, making it an ideal positive electrode material for the new generation of lithium-ion batteries.
Is 18650 lithium battery a lithium iron phosphate battery?
18650 lithium batteries include lithium cobalt oxide, lithium manganese oxide, lithium nickel oxide, ternary materials, lithium iron phosphate, etc. The cycle life of lithium iron phosphate batteries can reach 1000-2000 times, and high cycle is its characteristic. Compared with ternary lithium batteries, its unit price is much lower. Most of them are used in new energy buses.
After years of development, 18650 lithium batteries have become very mature and stable; Meanwhile, due to its long history, it has formed a relatively mature market application. With the development of new energy applications, the position of 18650 lithium batteries is gradually being challenged. Larger cylindrical lithium battery products and square battery products have emerged in large numbers in the market. Many companies have begun to use lithium iron phosphate batteries, which will gradually replace 18650 lithium batteries in power battery applications.
