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What does 18650 mean?
18650 means that the diameter is 18 mm, the length is 65 mm, and 0 means a cylindrical battery.
Structure lithium batteries
Lithium battery structure is divided into five parts, namely positive electrode, negative electrode, separator, electrolyte and shell.
The positive electrode of lithium battery contains active material, conductive agent, solvent, binder, matrix and other substances.
The negative electrode of lithium battery contains active material, binder, solvent, matrix and other substances.
Lithium battery shells include steel shells, aluminum shells, cover plates, tabs, insulating tapes and other hardware.
Classification of lithium batteries
Lithium batteries can be divided into two categories: lithium metal batteries and lithium ion batteries.
Lithium metal batteries are generally not rechargeable and contain metallic lithium.
Lithium-ion batteries do not contain lithium in the metallic state and are rechargeable.
At present, all lithium-ion batteries with rechargeable functions on the market are basically lithium-ion batteries. The English label for lithium-ion batteries is "Li-ion".
High voltage: The voltage of 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-hydrogen batteries.
No memory effect: it is not necessary to empty the remaining power before charging, which is convenient to use.
It can be combined in series or in parallel to form a 18650 lithium battery pack.
Wide range of use:
Notebook computers, walkie-talkies, portable DVDs, instrumentation, audio equipment, model aircraft, toys, video cameras, digital cameras and other electronic equipment.
Large capacity: The capacity of is generally between 1200mah and 3600mah, while the general battery capacity is only about 800mah. If combined into a 18650 lithium battery pack, the 18650 lithium battery pack can easily exceed 5000mah.
Long Lifespan: 18650 lithium battery has a long service life, and the cycle life can reach more than 500 times in normal use, which is more than twice that of ordinary batteries.
High safety performance: 18650 lithium battery has high safety performance. In order to prevent battery short circuit, the positive and negative electrodes of 18650 lithium battery are separated. Therefore, the possibility of short-circuiting has been reduced to the extreme. A protection board can be added to avoid overcharging and overdischarging o 18650 lithium batteryf the battery, which can also prolong the service life of the battery.
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