The advantages of 18650 lithium battery  | 18650 lithium battery analysis

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In our daily life, the 18650 lithium battery can be seen in many places. This type of battery not only has significant advantages compared with the others, but its safety is also relatively high. What’s more, it has even been used in large equipment. And this article will introduce you in detail about the 18650 battery.

More than 300 years ago, Benjamin Franklin began to capture lightning, which opened up people’s understanding of electricity. Since then, many people have been thinking about how to store the captured electricity, so gradually something like a battery came into being. As a very important invention in history, the emergence of batteries has indeed solved many problems and greatly improved life efficiency. And the emergence of lithium batteries has made people’s understanding of electricity more and more in-depth. The 18650 lithium battery is a kind of lithium battery that has been used for the longest time and still exists. Now, let’s take a look at the advantages of the 18650 lithium battery.

The advantages of the 18650 lithium battery

When the no-load voltage of the lithium battery is below 3.0V, the power is considered to be exhausted (the specific value depends on the threshold value of the battery management system, such as 2.8V and 3.2V are also possible). Most lithium batteries with a no-load voltage below 3.2V cannot be discharged, because over-discharge will damage the battery (generally, lithium batteries on the market are assembled with a BMS, over-discharge will also cause it to fail to detect the battery, and the battery cannot be charged).

4.2V is the highest limit voltage for battery charging. Charging a no-load voltage of the lithium battery to 4.2V is considered to be fully charged. During the battery charging process, the battery voltage gradually rises from 3.7V to 4.2V, and the lithium battery cannot be charged above 4.2V. Charge the no-load voltage above 4.2V, it will damage the battery too. This is the special part of lithium batteries. And the 18650 lithium battery has the following advantages.

1. Wide range of use

Notebook computers, walkie-talkies, portable DVDs, instrumentation, audio equipment, model aircraft, toys, video cameras, digital cameras, and other electronic equipment.

2. series connection

It can be combined in series or parallel to form a 18650 lithium battery pack.

3. Small internal resistance

The internal resistance of the polymer battery is smaller than that of the general liquid battery, and the internal resistance of the domestic polymer battery can even be below 35mΩ, which greatly reduces the self-consumption of the battery, prolongs the standby time of the batteries, and reach the international level. This polymer lithium battery that supports large discharge currents is an ideal choice for remote control models and has become the most promising product to replace nickel-metal hydride batteries.

4. No memory effect

It is not necessary to empty the remaining power before charging, which is convenient to use.

5. High voltage

The voltage of the 18650 lithium battery is generally 3.6V, 3.8V, and 4.2V, which is much higher than the 1.2V voltage of nickel-cadmium and nickel-metal hydride batteries.

6. High safety performance

18650 lithium battery has high safety performance, no explosion, no burning; non-toxic, non-polluting, certified by RoHS trademark; all kinds of safety performance are completed in one go, the cycles are more than 500 times; high-temperature resistance performance, discharge efficiency reaches 100% under the condition of 65 degrees. In order to prevent a short circuit of the battery, the positive and negative electrodes of the 18650 lithium battery are separated. Therefore, the possibility of short-circuiting has been extremely reduced. A protection board can be added to avoid overcharging and over-discharging of the battery, which can also prolong the service life of the battery.

7. Long service life

The 18650 lithium battery has a long service life, and the cycle life can reach more than 500 times during normal use, which is more than twice that of ordinary batteries.

8. Large capacity

The capacity of the 18650 lithium battery is generally between 1200mah and 3600mah, and the normal battery capacity is only about 800mah. If you combine 18650 lithium batteries to form 18650 lithium battery packs, the 18650 lithium battery pack can easily exceed 5000mah.