Analysis of 18650 lithium battery: design and construction points
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2023/08/17 16:38:52
The 18650 lithium battery is a common lithium-ion battery, and its name represents its main specifications and sizes. The following is the general design and construction of 18650 lithium batteries:
Shell: The shell of the 18650 lithium battery is usually made of a metal material (such as aluminum alloy) and has a cylindrical shape. The housing provides the physical protection and structural stability of the battery.
Positive and negative: The positive and negative electrodes of the 18650 lithium battery are composed of different chemical materials. The positive electrode is usually made of lithium compounds (such as lithium manganate, lithium cobaltate, or ternary materials), and the negative electrode is usually made of carbon materials (such as graphite).
Electrolyte: The electrolyte of the 18650 lithium battery is a conductive liquid, usually lithium salt in an organic solvent. The electrolyte transfers ions between the positive and negative electrodes, facilitating the charging and discharging process of the battery.
Separator: Separator is a thin film located between the positive and negative electrodes, which is used to isolate the positive and negative electrodes to prevent short circuits and internal reactions in the battery. The separator is usually made of a polymer material.
Leads and connectors: 18650 lithium batteries typically have leads and connectors for connecting the battery to an electronic device or battery pack.
Protection circuit (some batteries) : Some 18650 lithium batteries have built-in protection circuits to monitor the status of the battery, control the charge and discharge process, and provide short circuit, overcurrent, and overcharge protection.
The 18650 lithium battery design can be adapted to different applications and needs to meet specific performance, capacity and safety requirements. In practical applications, the design of the battery may also be different, but the elements listed above are the main components that make up the average 18650 lithium battery.
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