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18650 lithium-ion battery introduction

    The 18650 lithium-ion battery is a widely used battery type, and the "18650" in its name reveals its basic size: about 18mm in diameter and 65mm in height. This cylindrical battery is not only small in size, but also has a large capacity and high energy density, so it is widely used in all kinds of electronic devices, where "0" means cylindrical battery. Historically, the 18650 is a standard lithium-ion battery model set by SONY, the originator of lithium-ion batteries, in order to save costs. The voltage of the 18650 lithium-ion battery is usually between 3.6V and 3.7V, while the charging voltage can reach 4.2V. Its wide capacity range, ranging from 1200mAh to 3600mAh, is much higher than traditional nickel-cadmium and nickel-metal hydride batteries, which makes it able to meet the long-term operation needs of various devices. At the same time, by combining a number of 18650 lithium-ion batteries, a lithium-ion battery pack can be formed, and its capacity can even break through 5000mAh, providing powerful power support for large equipment.

    In addition to the large capacity, the 18650 lithium-ion battery also has the characteristics of long life. Under normal conditions of use, its cycle life can reach more than 500 times, which is more than twice that of ordinary batteries. In addition, it also has high safety performance, not easy to explode, not easy to burn, and non-toxic, pollution-free, in line with RoHS environmental standards. These advantages make the 18650 lithium-ion battery the first choice for many electronic device manufacturers. However, in order to give full play to the performance of the 18650 lithium-ion battery and extend its service life, the correct use and maintenance methods are crucial. Users should strictly follow the discharge standards in the battery specification book to avoid excessive discharge or charging. At the same time, when storing the battery, ensure that it is in a dry, cool environment, avoid direct sunlight and high temperature. 18650 lithium-ion battery with its large capacity, long life and high safety and other advantages, plays an important role in all kinds of electronic equipment. The correct use and maintenance methods can ensure the full play of its performance and extend its service life.

What is 18650 lithium-ion battery?

    The 18650 lithium-ion battery is a cylindrical rechargeable battery, where the "18650" refers to its external size number. Specifically, this number represents a battery with a diameter of 18mm and a length of 65mm. Lithium-ion batteries have been widely used in many fields because of their high energy density, long life and environmental protection.

2, 18650, the structure and working principle of lithium-ion battery

  1. structure: 18650 lithium ion batteries is mainly composed of the positive and negative, the diaphragm and the electrolyte, etc. The positive electrode material is usually lithium cobalt acid or ternary material, the negative electrode material is graphite, the diaphragm plays a role in isolating the positive and negative electrodes and preventing short circuit, and the electrolyte is responsible for conducting lithium ions.

  2.   How it works: When the battery is charged, lithium ions come out of the positive electrode, pass through the electrolyte to the negative electrode and are reduced there, when the battery is discharged, this process will be reversed, so the name "lithium-ion battery".

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the advantages and application of the 3, 18650 lithium ion battery

  1. Advantages: The advantages of 18650 lithium-ion battery include high energy density, no memory effect, low self-discharge rate, and no pollution. Due to its high energy density, it can store more electrical energy for the same volume and weight. In addition, it has high operating voltage, high charging efficiency and long service life.

  2.   Usage: Due to the above advantages, 18650 lithium-ion batteries are widely used in electric vehicles, power tools, portable electronic equipment and other fields. In addition, in the field of electric vehicles, it is one of the important choices for electric vehicle power batteries.

4, 18650 the choose and buy of lithium ion battery and use note

  1. to choose: When purchasing 18650 lithium-ion batteries, attention should be paid to their capacity, internal resistance, discharge performance and other parameters. At the same time, we should choose regular brands and products produced by manufacturers to ensure product quality and after-sales service.

  2.   Use precautions: In the process of use, to avoid overcharging and excessive discharge, so as not to affect the battery life and safety performance. In addition, the use and storage of batteries in high temperature environments should be avoided to prevent the occurrence of thermal runaway phenomenon.

five, how to maintain and extend 18650 lithium ion battery life?

    To properly maintain and extend the life of the 18650 lithium-ion battery, the following points need to be done: First, maintain appropriate charging habits to avoid overcharging and excessive discharge; Secondly, maintain a suitable temperature range during storage and use; In addition, try to choose a battery with discharge memory management function, which can ensure the work performance under different voltages and maintenance performance when charging. At the same time, it is necessary to avoid damage caused by hard bumps and so on. In short, it is necessary to maintain its proper operating environment and maintain standardized daily operations.