What is the best way to double the life of a lithium 18650 battery?

Presently, 3.7V 18650 lithium batteries have a general cycle life of 500 to 1000 times, while 3.2V 18650 lithium batteries have a general cycle life of more than 2000 times. 18650 manufacture Obviously, the premise is that the qualified battery produced by the regular manufacturer, if it is defective or counterfeit, the life will be very short. The 18650 lithium battery will only last between two and three years.

A lithium battery can typically be charged 300-500 times. In order to avoid students often complete discharges, it is best to analyze partial discharge of lithium battery technology rather than a completely different discharge. Lithium batteries have a network life of only two to three years once they are off the production line. No matter whether you use them or not.

If a full discharge provides Q, lithium can provide or supplement the 18650 lithium battery's life of 300Q to 500Q, which may be reduced after each charge cycle. We know from this 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, the degree will vary.

It is often said that lithium batteries have a "500-times" life, but "times" in the context of lithium batteries refer to the cycle life, i.e. the number of charges x the number of discharges = the cycle life. The numerical discharge depth is 80%, so at least 625 cycles of charging and discharging are required to determine the cycle life, which 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. To put it another way, lithium-ion batteries' battery life is determined by their total charge, not how many times they have been charged. Deep charging has a similar effect on lithium life as shallow charging.

What is the best way to double the life of a lithium 18650 battery?

First of all, lithium batteries are sensitive to cold and heat, so do not use them in extreme climates

During the summer, many people leave their lithium-ion electric vehicles out in the sun, while during the winter, they park them in the yard or on the street, which negatively impacts their battery life, and temperature affects the rate at which lithium ions migrate through electrolytes and electrodes. Theoretically, -20°C to 55°C can be used normally.

If the temperature is between 5 °C and 35 °C, lithium batteries won't be damaged. Northern users should store lithium batteries indoors during winter. Southern users should avoid direct sunlight during summer.

Lithium batteries should not be charged and discharged frequently

It is a common misconception that the lithium battery in an electric vehicle can be charged hundreds of times with just one plug and unplug. However, this is not entirely accurate. The manual actually refers to the number of complete discharges. While nickel-cadmium batteries have a memory effect, lithium batteries do not, allowing them to be charged at any time without consequence. Nevertheless, charging while the battery is already partially charged can decrease its lifespan. To properly maintain and extend the cycle life of a lithium battery, it is best to charge it slowly and avoid deep discharges.

Advantages and disadvantages of 18650 lithium batteries

The advantages are:

As opposed to the 1.18650 lithium batteries, which have a capacity between Mach 1200 and 3600, the 18650 lithium ion batteries have a capacity of about Mach 800.

The long-life 18650 lithium battery has a cycle life of more than 500 times, which is twice as long as ordinary batteries.

The 18650 lithium battery boasts exceptional safety features, with no risk of explosion or combustion. It is also non-toxic and environmentally friendly, verified by RoHS trademark certification. Its impressive safety performance includes a cycle life of over 500 times and the ability to withstand high temperatures up to 65 degrees with a discharge efficiency of 100%. To further enhance safety measures, the positive and negative electrodes of the battery are separated to prevent short circuits. For added protection against overcharging and overdischarging, a protective plate can be installed to extend the battery's lifespan.

In general, 18650 lithium batteries are 3.6V, 3.8V, or 4.2V in voltage, which is much higher than nickel-cadmium and nickel-metal hydride batteries, which are 1.2V.

The use of their own charging before the remaining power will not have to empty, so there is no memory effect.

The internal resistance of polymer batteries is significantly lower than that of traditional liquid batteries. In fact, domestic polymer batteries boast an impressively low internal resistance of less than 35mω. This greatly decreases the battery's self-consumption and extends the standby time of mobile phones to an international standard. Furthermore, polymer lithium batteries are capable of handling high discharge currents, making them ideal for remote control models. As a result, they are considered to be the most promising alternative to NIMH batteries.

A battery pack made up of 18650 lithium batteries can be formed by connecting them in series or by combining them.

You will use laptop computers, walkie-talkies, portable DVD players, audio equipment, aircraft models, toys, video cameras, digital cameras, and other electronic devices.

The cons are:

There is one disadvantage of the 1.18650 lithium battery: its volume has been fixed, and it is not well positioned on some notebooks or products. As compared to other lithium polymer lithium batteries, which can be customized and sized, this shortcoming can be seen as an advantage. As a result, it has also become an advantage over some products with specific battery specifications.

It is also a relative to the development of polymer lithium batteries, if there is no relatively general battery, this shortcoming is not so evident.

To prevent overcharging and discharges of 3,18650 lithium-ion batteries, a protective circuit must be used to manufacture them. Of course, this is necessary for lithium-ion batteries. Lithium-ion batteries also have this disadvantage because they are made of lithium cobalt oxide, and lithium cobalt oxide batteries cannot be charged at high currents, and they are not safe to use.

4. The production conditions of 18650 lithium batteries are higher than those for general battery production, which undoubtedly increases the cost of production.

Use of 18650 lithium batteries

It was estimated that the 18650 battery could last 1,000 charge cycles due to its large unit density capacity, and due to its excellent stability, 18650 is 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.