How long would an 1865 lithium-ion battery last?

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

Lithium battery companies generally we can charge 300-500 times. battery manufacturing machine It is best to analyze partial discharge of lithium battery technology, rather than a completely different discharge, and to try to avoid students often complete discharge. Once the battery is off the production line, the clock starts running. Whether you need to use it or not, lithium batteries have a network life of only two to three years.

The service life of the 18650 lithium battery is generally 300 to 500 charge cycles. li ion battery construction Assuming a full discharge provides Q, lithium can provide or supplement its life of 300Q-500Q, whether reduced after each charge cycle. From this we know that if you charge 1/2 each time, you can charge 600-1000 times; If you charge 1/3 each time, you can charge 900-1500 times. For example, if the charge is random, then the degree is variable.

People often hear a saying that the life of lithium batteries is "500 times", and the "times" in the principle sense of lithium batteries refers to the cycle life, that is, a complete charge and discharge cycle. The test method in the industry is: discharge depth x number of charges = cycle life, the numerical discharge depth is 80%, at least 625 times of charge and discharge, that is, 80% x 625 = 500(.

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?

First, lithium batteries are afraid of cold and heat, do not use in an extreme environment

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.

When the temperature is between 5 ° C and 35 ° C, there is no harm to lithium batteries. Northern users in winter try to take lithium batteries home storage, do not put outdoors. Southern users should avoid sun exposure in summer.

Do not charge and discharge lithium batteries frequently

Many people think that the lithium battery on the electric vehicle manual hundreds of times the number of cycles of charging, that is, only need to plug and remove once can be used. This is actually a mistake. In fact, the manual refers to the number of complete redischarges. Unlike nickel-cadmium batteries, lithium batteries have no memory effect and can be charged anytime and anywhere. Charging while the battery is still charged will not only shorten the service life, but also maintain the battery and extend its cycle life. For lithium batteries, the correct approach is to charge slowly, not deeply.

18650 lithium battery technology advantages and disadvantages

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 life is long, normal use of the cycle life of more than 500 times, is more than twice the ordinary battery.

high safety performance, 18650 lithium battery high safety performance, no explosion, no combustion; Non-toxic, non-polluting, RoHS trademark certification; The safety performance is completed in one go, the number of cycles is more than 500 times; High temperature resistance, 65 degrees discharge efficiency reaches 100%. In order to prevent short circuit of the battery, the positive and negative electrodes of the 18650 lithium battery are separated. So the possibility of short circuit has been reduced to the extreme. You can install a protection plate to avoid overcharging and overdischarging the battery and extend the service life of the battery.

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

there is no memory effect in their own charging before the remaining power will not have to empty, the use can be convenient.

Low internal resistance: The internal resistance of polymer batteries is less than that of ordinary liquid batteries. The internal resistance of the domestic polymer battery can be lower than 35mω, which greatly reduces the self-consumption of the battery, extends the standby time of the mobile phone, and can reach the level of international integration. Polymer lithium batteries that support large discharge currents are ideal for remote control models and are the most promising alternatives to NIMH batteries.

It can be connected in series or combined to form an 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 lithium battery easy to lead to short circuit or information explosion, is also a relative to the development of polymer lithium battery, if there is no relatively general battery, this shortcoming is not so obvious.

The production of 3,18650 lithium-ion batteries requires a protective circuit to prevent the battery from being overcharged and causing discharges. Of course, this is necessary for lithium-ion batteries. This is also a disadvantage of lithium-ion batteries, because lithium-ion batteries are made of lithium cobalt oxide, and lithium-ion batteries made of lithium cobalt oxide cannot be charged at high currents, and safety is poor.

18650 lithium battery production conditions are high. Compared with the general battery production, the production conditions of 18650 lithium batteries are higher, which undoubtedly increases the production cost.

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.

cylindrical lithium-ion batteries clarification

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