Here's a quick lesson on lithium-ion batteries in 1865!

Japan's SONY Corporation has established a standard lithium-ion battery model, labeled as 18650. This model has three numbers: 18 for its diameter of 18mm, 65 for its length of 65mm, and 0 to indicate its cylindrical shape. 18650 manufacture The 18650 is the original lithium-ion battery and is commonly used in two variations: lithium-ion and lithium iron phosphate. The nominal voltage for both types is different; with the lithium-ion having a voltage of 3.7v and charging cut-off voltage of 4.2v, while the lithium iron phosphate has a nominal voltage of 3.2V and charging cut-off voltage of 3.6v. Capacities for these batteries usually range from 1200mAh-3350mAh, with the most common being between 2200mAh-2600mAh.

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The next step is to discuss the advantages and disadvantages of 18650 lithium batteries

The advantages are:

The capacity is large

18650 lithium batteries have a capacity of 1200 MAh-3600 mAh, while ordinary batteries only have a capacity of about 800MAh. When the 18650 lithium battery pack is added, the 18650 lithium battery pack can easily exceed 5000MAh.

Longevity

Its normal service life can reach more than 500 times, which is more than twice as long as ordinary lithium batteries.

A high level of safety performance

The 18650 lithium battery boasts excellent safety features, with no risk of explosion or combustion. It is also non-toxic and environmentally friendly, holding the RoHS trademark certification. With a lifespan of over 500 cycles, it has excellent safety performance and can withstand high temperatures up to 65 degrees. To minimize the risk of short circuits, the battery's positive and negative electrodes are kept separate. For added protection, consider using a protective plate to prevent overcharging and overdischarging, ultimately prolonging the battery's lifespan.

The fourth is high voltage

In general, 18650 lithium batteries have voltages of 3.6V, 3.8V, and 4.2V, which is much higher than the 1.2V voltage of nickel-cadmium and nickel-metal hydride batteries.

Easy to use, no memory effect

It is not necessary to empty the remaining battery before charging since there is no memory effect.

The internal resistance is small:

18650 Lithium battery packs can be connected in series or parallel.

Wide range of applications

Computer, walkie-talkie, portable DVD, instrument instrumentation, sound system equipment, model aircraft, toys, video cameras, digital cameras, and other electronic technology equipment can be used with this device.

The cons are:

Volume fixed at one

One major drawback of the 18650 lithium-ion battery is its fixed size, which can make installation challenging for certain laptops or products. However, this rigidity can also be viewed as an advantage when compared to customizable and variable-sized options like polymer lithium-ion batteries. For products that require a specific battery size, the 18650 may be the preferred choice. Additionally, it should be noted that the 18650 lithium-ion battery has a higher risk of short circuits and explosions compared to the less common polymer lithium-ion battery.

The line must be protected

In order to prevent overcharging and discharge of the 18650 lithium battery, the circuit must be protected during production. As a matter of fact, this is a requirement for lithium batteries, but it is also a disadvantage because lithium batteries are primarily made from lithium cobalt acid materials, which cannot be discharged at high currents, which makes them unsafe.

A strict set of requirements must be produced

Comparatively to the general production of lithium-ion batteries, the production conditions of 18650 batteries are very good. This undoubtedly increases the production cost.