Analysis of the advantages of 18650 lithium batteries.
More than 300 years ago, Benjamin Franklin began capturing lightning, which opened up people's understanding of lightning and electricity. Since then, many people have been considering how to store the captured electricity, and gradually the battery emerged. Indeed, as a very important invention in history, the emergence of batteries has indeed solved many problems and greatly improved various life efficiencies. The emergence of lithium batteries has further deepened people's understanding of electricity. 18650 lithium batteries are the oldest and still exist in many fields. The shadow of 18650 lithium batteries can be seen in many places because compared to other types of batteries. Batteries have obvious advantages and relatively good safety, Even though it has been used in large devices, this article will introduce the knowledge of 18650 batteries to everyone.
1、 The advantages of 18650 lithium batteries
It is generally believed that when the no-load voltage of a lithium battery is below 3.0V, it is considered to be fully charged (the specific value depends on the threshold value of the battery protection board, such as as as as low as 2.8V or 3.2V). Most lithium batteries cannot be discharged with a no-load voltage below 3.2V, otherwise excessive discharge will damage the battery (generally, lithium batteries on the market are mostly used with protective plates, so excessive discharge can also cause the protective plate to not detect the battery, making it impossible to charge the battery).
4.2V is the maximum limit voltage for battery charging. It is generally believed that charging a lithium battery to 4.2V at no load voltage means that it is fully charged. During the battery charging process, the voltage of the battery gradually rises from 3.7V to 4.2V. Charging a lithium battery cannot exceed 4.2V at no load voltage, otherwise it will also damage the battery. This is the special feature of lithium batteries. Generally speaking, 18650 lithium batteries have the following advantages.
1. Widely applicable
Energy storage, electronic cigarettes, solar street lights, communication base stations, medical equipment AGV、 Golf carts and other different fields.
2. Series connection
Can be combined in series or parallel to form 18650 lithium battery packs.
3. 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 polymer lithium battery that supports high discharge current is an ideal choice for remote control models and has become the most promising alternative to nickel hydrogen batteries.
4. No memory effect
There is no need to empty the remaining battery before charging, which is convenient to use.
5. High voltage
The voltage of 18650 lithium batteries is generally at 3.6V, 3.8V, and 4.2V, much higher than the 1.2V voltage of nickel cadmium and nickel hydrogen batteries.
6. High security performance
18650 lithium batteries have high safety performance, do not explode, and do not burn; 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.
7. Long service life
The lifespan of 18650 lithium batteries is very long, with a normal cycle life of over 500 times, which is more than twice that of ordinary batteries.
8. 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, the 18650 lithium battery pack can easily exceed 5000mAh.
