An analysis of the advantages of 18650 lithium batteries.

An analysis of the advantages of 18650 lithium batteries.

18650 lithium batteries are equipped with fully automatic protection plates, which can effectively protect against short circuits, overcharging, and overdischarging. And it enables the battery to be reliably charged using a regular charger, without worrying about overcharging or insufficient charging. 18650 lithium batteries typically have a single cell voltage of 3.7V and a maximum voltage of 4.2V, and typically have the following advantages.

18650 lithium batteries use aluminum-plastic flexible packaging in their structure, which is different from the metal casing of liquid batteries. In the event of a safety hazard, liquid batteries are prone to explosion, while polymer batteries can only inflate at most.

Ordinary liquid lithium batteries adopt the method of customizing the shell first, and then inserting positive and negative electrode materials. There is a technical bottleneck in achieving a thickness of less than 3.6mm, while 18650 batteries do not have this problem. The thickness can be reduced to less than 1mm, which meets the current demand for mobile phones.

18650 batteries are 40% lighter than steel shell lithium batteries of the same capacity specification and 20% lighter than aluminum shell batteries.

Polymer batteries have a capacity 10-15% higher than steel shell batteries of the same size and specifications, and 5-10% higher than aluminum shell batteries, making them the preferred choice for color screen phones and MMS phones. Currently, most newly released color screen and MMS phones on the market also use polymer batteries.

The internal resistance of polymer battery cells is smaller than that of general liquid battery cells. Currently, the internal resistance of domestic polymer battery cells can even reach below 35m Ω, greatly reducing the self consumption of batteries and extending the standby time of mobile phones, which can fully reach the level of international standards. This polymer lithium battery that supports high discharge current is an ideal choice for remote control models and has become the most promising alternative to nickel hydrogen batteries.

18650 batteries can increase or decrease the thickness of battery cells according to customer needs, develop new battery cell models, be inexpensive, have short mold cycles, and some can even be customized according to the shape of the phone to fully utilize the space of the battery casing and increase battery capacity.

18650 batteries use colloidal electrolytes, which have smooth discharge characteristics and higher discharge platforms compared to liquid electrolytes.