What are the types of 18650 lithium batteries.
As a very important invention in history, the emergence of batteries has solved many problems and greatly improved our efficiency in life. With the emergence of lithium batteries, people's understanding of electricity has become more and more profound. The
18650 lithium battery is the longest used and still exists type of lithium battery.
What is an 18650 battery?
When it comes to this battery, one would first ask what does the number 18650 in front of it represent? Is it the model? Size or something. In fact, it simply represents the external size, 18 refers to the battery diameter of 18.0mm, and 650 refers to the battery height of 65.0mm.
What are the types of 18650 lithium batteries available?
The first type of lithium battery is classified by appearance
There are square lithium batteries, such as commonly used mobile phone batteries and
cylindrical lithium batteries. For cylindrical lithium-ion batteries, their model number is usually 5 digits. The first two digits represent the diameter of the battery, and the middle two digits represent the height of the battery. The unit is millimeters, just like a 18560 lithium battery
The second type is divided by lithium battery outsourcing materials
There are aluminum shell lithium batteries, steel shell lithium batteries, and soft pack batteries; The outsourcing material of lithium batteries is the material that covers the surface of the battery, and the classification of different materials also varies. There are more aluminum shell lithium batteries and steel shell lithium batteries on the market.
The third type is based on the positive and negative electrode materials of lithium batteries
Gu acid lithium battery or manganese acid lithium battery, as well as lithium iron phosphate battery and disposable manganese dioxide lithium battery; Among these, lithium iron phosphate is quite common, and lithium iron phosphate batteries, also known as lithium iron phosphate power batteries, are very suitable for use in power related fields due to their performance. Lithium cobalt oxide batteries have stable structure, high capacity ratio, and outstanding comprehensive performance, but their disadvantages include poor safety and high cost. Therefore, they are mainly used in small and medium-sized battery cells, and are used in small electronic devices such as laptops, mobile phones, MP3/4, etc.
The fourth type is divided by battery practicality
There are power type batteries and energy type batteries. Energy type batteries are characterized by high energy density and are mainly used for high energy output; Power type batteries are characterized by high power density and are mainly used for instantaneous high-power input and output batteries. Just like running, the energy type is a 1000 meter long run, while the power type is a 50 meter short run. A 1000 meter long run requires endurance and a large capacity, with generally low or even low requirements for high current discharge performance. The 50 meter sprint aims for burst power, but it also requires endurance, otherwise the capacity is too small to run far.
