The advantages of 18650 battery.
The shadow of
18650 lithium batteries can be seen in many fields, because this type of battery has obvious advantages compared to other batteries, and its safety is relatively good. It has even been used in large-scale equipment. This article will introduce the knowledge of 18650 batteries to you.
What is 18650 lithium battery?
The 18650 we talk about in daily life actually refers to the external specifications of the battery, which was a standard model set by Sony Corporation in Japan to save costs. Among them, 18 represents a diameter of 18mm, 65 represents a length of 65mm, and 0 represents a cylindrical battery.
18650 battery originally referred to nickel hydrogen battery and lithium-ion battery, but now it mostly refers to lithium-ion battery because nickel hydrogen is less commonly used. Because its positive electrode is a battery made of "lithium cobalt oxide" as the positive electrode material, of course, there are many batteries on the market now, including batteries with lithium iron phosphate, lithium manganese oxide, and other positive electrode materials. The nominal voltage of a single 18650 lithium-ion battery is generally 3.6V or 3.7V; The minimum discharge termination voltage is generally 2.75V. The common capacity is 1200-3100mAh, and a capacity higher than 3400mAh is basically a virtual standard.
Scope of use of 18650 lithium battery
The 18650 lithium battery can be said to be ubiquitous in daily life, and it has been long-lasting since Sony launched it in the 1990s. 18650 batteries are known for their large capacity and high energy storage efficiency. The advantages of good stability, no memory effect, high cycle life, and no toxic substances are widely used in industrial fields and electronic devices such as laptops, walkie talkies, portable DVDs, instruments and meters, audio equipment, model airplanes, toys, cameras, digital cameras, etc. Even the recently popular Tesla electric vehicle also uses the 18650 battery pack provided by Panasonic.
Advantages of 18650 lithium battery
High security
18650 lithium batteries have high safety performance, do not explode, and do not burn; Non toxic, substance contaminated, 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.
Long service life
The lifespan of 18650 lithium batteries is very long, with over 500 cycles during normal use, which is more than twice that of regular batteries.
Large capacity
The capacity of
18650 lithium batteries is generally between 1200mAh and 3600maH, while the capacity of a group of batteries is only about 800. If 18650 lithium batteries are combined to form an 18650 lithium battery pack, the 18650 lithium battery pack can easily exceed 500maH
Low internal resistance
The internal resistance of polymer battery cells is smaller than that of general liquid battery cells, and the internal resistance of domestic polymer battery cells can even reach below 35m Ω, greatly reducing the self consumption of batteries and extending the standby time of mobile phones, which can fully reach the level of international standards. This type of polymeric physical lithium battery that supports high discharge current is an ideal choice for remote control models and has become the most promising product to replace nickel hydrogen batteries.
