What is the life expectancy of an 1865 lithium-ion battery?

What is the life expectancy of an 1865 lithium-ion battery?

At present, 3.7V 18650 lithium batteries have a general cycle life of 500 to 1000 times, nmp recovery system while 3.2V 18650 lithium batteries have a general cycle life of more than 2000 times. As a matter of fact, the premise is that the qualified battery supplied by the regular manufacturer, if it is defective or counterfeit, will have a very short service life. The 18650 lithium battery has a service life of only two to three years.

It is best to analyze partial discharge of lithium battery technology rather than a completely different discharge, and to avoid students often complete discharge. Lithium battery companies generally allow us to charge 300-500 times. n methyl 2 pyrrolidone solvent Lithium batteries have a network life of only two to three years once they are taken off the production line.

If a full discharge provides Q, lithium can provide or supplement the life of an 18650 lithium battery of 300 to 500 charge cycles, regardless of how much it is reduced after each charge cycle. Therefore, if you charge 1/2 each time, you can charge 600-1000 times; if you charge 1/3 every time, you can charge 900-1500 times. For example, if the charge is random, the degree will vary.

According to a common saying, lithium batteries have a life of 500 times. nmp chemical This refers to the cycle life, which is the time it takes to charge and discharge the battery. In the industry, discharge depth x number of charges = cycle life. The numerical discharge depth is 80%, which means it must be charged and discharged at least 625 times, or 80% x 625 = 500.

No matter how it is charged, the total power supply into the power supply is constant. In other words, lithium-ion battery life is determined by the total charge of the battery, not the number of times the battery has been charged. The effects of deep and shallow charging on lithium life are similar.

What is the best way to double the service life of 18650 lithium batteries?

Lithium batteries are afraid of cold and heat, so do not use them in extreme conditions

Many people like to leave their lithium-ion electric vehicles out in the sun in the summer, or park them in the yard or on the street in the winter, which is detrimental to their battery life, and lithium ions migrate through electrolytes and electrodes at a rate closely related to temperature. In theory, they can be used at temperatures between 20 °C and 55 °C.

In temperatures between 5°C and 35°C, lithium batteries are not damaged. Northern users in winter should store their lithium batteries indoors, not outdoors. Southern users should avoid sun exposure in summer.

Lithium batteries should not be charged and discharged frequently

There is a common belief that the lithium battery in electric vehicles can be charged and used hundreds of times with just one plug-in and removal. However, this is not entirely accurate. The manual actually refers to the number of full discharges, unlike nickel-cadmium batteries which have memory effects and can be charged at any time. Charging while the battery is still partially charged may reduce its lifespan and hinder its overall cycle life. Therefore, it is recommended to charge lithium batteries slowly rather than deeply.

Advantages and disadvantages of 18650 lithium batteries

life expectancy analyze partial discharge

10