How long would an 1865 lithium-ion battery last?

Now 3.7V 18650 lithium battery general cycle life can reach 500~1000 times, 18650 pack builder 3.2V 18650 general life can reach more than 2000, of course, the premise is the regular manufacturer of qualified batteries, if it is defective or counterfeit batteries, the life will be very short. The service life of the 18650 lithium battery is only two to three years.

Lithium-ion batteries can be charged and discharged 300-500 times. battery manufacturing machine It is best to discharge only part of the lithium-ion battery, not all of it, and avoid all of it often. As soon as the battery goes offline, the clock starts moving. Whether you use it or not, lithium-ion batteries only last two to three years.

The life of the 18650 lithium battery is generally 300 to 500 charge cycles. li ion battery construction Assuming that the power provided by a full discharge is Q, if the power drop after each charge cycle is not considered, the lithium battery can provide or supplement the power of 300Q-500Q during its life. From this we know that if you charge with 1 u002F2 each time, you can charge 600-1000 times; If you use 1 u002F3 each time, you can charge 900 ~ 1500 times. And so on, if you charge randomly, the number is uncertain.

People can often hear a Chinese statement is that the life of lithium batteries is "500 times", the working principle of lithium batteries in the sense of "times" refers to the cycle life, that is, such a company is completely different charge and discharge time cycle, the test and analysis method in the industry is: Discharge depth x number of charges = cycle economy life, in the numerical discharge depth of 80%, at least 625 times of charge and discharge, that is, 80% x 625=500 (times).

In short, no matter how it is charged, the total power supply into the 300Q ~ 500Q power supply is constant. So here's another way to think about it: lithium-ion battery life depends on the total charge, not the number of times the battery has been charged. The effect of deep charge and shallow charge on lithium life is similar.

How to double the service life of 18650 lithium battery?

Lithium-ion batteries are afraid of heat and cold and cannot be used in extreme environments

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 the rate of migration of lithium ions through electrolytes and electrodes is closely related to temperature. Theoretically, temperatures between -20 °C and 55 °C can be used normally.

The use of ambient temperature between 5 ° C and 35 ° C is not harmful to lithium batteries, northern users can take lithium batteries back to their homes as much as possible in winter, do not put them outside, and southern users can avoid exposure to the sun this summer.

Do not charge and discharge lithium batteries frequently

Many people think that in the electric car manual, the number of times a lithium-ion battery is charged is once, as long as it is plugged in once and then unplugged once. Actually, it was a misunderstanding. The manual actually refers to the number of times a battery needs to be fully charged, unlike nickel-cadmium batteries, lithium-ion batteries do not have any memory effect and can be recharged at any time and place. Charging when the battery has remaining power will not shorten its service life, but it can also maintain the battery and extend its cycle life, for lithium batteries, the correct approach is slow charging rather than deep charging.

Advantages and disadvantages of 18650 lithium battery

Advantages:

The capacity of the 1.18650 lithium battery is between Mach 1200 and 3600, but the capacity of the battery is only about Mach 800, and the capacity of the 18650 lithium ion battery can easily exceed Mach 5000.

long life 18650 lithium battery network life cycle is very long, normal use of the cycle economy life can generally reach more than 500 times, is more than twice the ordinary car battery.

High safety 18650 lithium battery high safety performance, no explosion, no combustion; Non-toxic, pollution-free, certified by RoHS trademark; All kinds of safety performance one-time, more than 500 cycles; High temperature performance, 65 °C power down efficiency 100%. In order to prevent short circuits, the positive and negative electrodes of the 18650 lithium-ion battery are separated. So the possibility of a short circuit has been reduced to the limit. A protection plate can be installed to prevent the battery from overcharging and overdischarging, and extend the battery service life.

The voltage of 18650 lithium batteries is generally 3.6V, 3.8V and 4.2V, which is much higher than the 1.2V voltage of nickel-cadmium and nickel-metal hydride power batteries.

No memory effect, no need to empty the remaining power before charging, easy to use.

Small internal resistance: the internal resistance of the polymer battery is less than that of the ordinary liquid battery, and the internal resistance of the domestic polymer battery can even be less than 35 mω, which greatly reduces the self-consumption of the battery and extends the standby time of the mobile phone, and can fully meet the level of international standards. This polymer lithium battery, which supports large discharge currents, is ideal for remote control models and is the most promising alternative to Ni-MH batteries.

can be combined in series or parallel into 18650 lithium battery pack.

Use a wide range of laptop computers, walkie-talkies, portable DVDS, instruments, audio equipment, aircraft models, toys, video cameras, digital cameras and other electronic equipment.

Cons:

The biggest disadvantage of 1.18650 lithium battery is that the volume has been fixed, and it is not well positioned on some notebooks or some products. Of course, this shortcoming can also be said to be an advantage, compared to other lithium polymer lithium batteries that can be customized and changed in size. And it has also become an advantage over some products with specified battery specifications.

18650 Li-ion batteries are prone to short circuits and explosions, unlike polymer Li-ion batteries, which are less obvious than conventional batteries.

the production of 18650 lithium battery enterprises need to have environmental protection tourism routes to prevent the battery from being overcharged and resulting in discharge. Of course, these are all necessary for students in our society for Chinese lithium batteries, which is also a disadvantage of lithium batteries, because the basic problems of the materials that lithium batteries can use are lithium cobalt acid materials, and the lithium batteries of lithium cobalt acid materials can not be discharged with large current, and the safety is poor.

18650 lithium battery production and living conditions of the development of high requirements, relative to the general battery production, 18650 lithium battery on the production technical conditions are very high, which undoubtedly increases the cost of social production management.

18650 lithium battery use

The 18650 theory of battery life called for 1,000 charge cycles. Due to its large unit density capacity, most of it is used for notebook batteries, in addition, 18650 in the work of excellent stability, widely used in all major electronic fields: high-end flashlights, portable power supplies, wireless data transmission, warm clothing, shoes, portable instruments, portable lighting equipment, portable printers, industrial equipment, medical equipment and so on.