The number of cycles and charge cycles of a battery are inextricably linked. The so-called battery cycle charging is to complete a complete charge and discharge cycle, so the number of cycles is actually a calculation method of the charging cycle. When the battery reaches a complete charging cycle, the number of battery cycles will be +1. This article explains how to calculate the cycle number of lithium-ion batteries? How are lithium-ion batteries recycled?

How to calculate the cycle number of lithium ion battery?

The theoretical life of a Li-ion battery is about 800 cycles, which is mid-range among commercially available rechargeable Li-ion batteries. Lithium iron phosphate is about 2,000 cycles, while lithium titanate is said to reach 10,000 cycles. At present, mainstream battery manufacturers promise more than 500 times in their cell specifications, but after the cells are assembled into battery packs, due to consistency problems, the important thing is that the voltage and internal resistance cannot be exactly the same, and their cycle life About 400 times.

① It is best to have a complete discharge and charge process once a week, that is, from red power to full power, and it is best to realize that the battery is almost exhausted once a week, and then fully charged;

②Complete cycle charging refers to recharging to 100% after the battery is used up to 0%, and recharging when the power is lower than 20% is cycle charging. Lithium-ion batteries should not be fully cycled for normal use, because lithium-ion batteries have no memory effect. , without any adjustments;

③It is the best time to unplug the charger when it is charged to 100%. After charging to 100%, charge it for one hour. The ion battery has entered the overcharge protection and has stopped charging, and the next time is only battery consumption and overcharge, so there is no need to charge more.

How to calculate the life cycle of lithium-ion battery?

The number of life cycles of lithium-ion batteries is determined according to battery quality and battery materials:

1. The cycle times of ternary materials is about 800 times;

2. The cycle times of lithium iron phosphate battery is about 2500 times;

3. There is a difference in the number of cycles between a genuine battery and a defective battery. The genuine battery is designed and produced according to the cycle number on the battery manufacturer's specification, while the cycle number of a defective battery may sometimes be less than 50 times.

How are lithium-ion batteries recycled?

(1) Fire recycling technology: Lithium-ion batteries are sorted, crushed and sent to the rotary kiln. At a high temperature of 1100-1300 degrees Celsius, zinc and zinc chloride are oxidized to zinc oxide and discharged with the flue gas. The dust collector recovers zinc oxide, and the remaining manganese dioxide and hydromanganese enter the residue to further recover manganese and other substances. General smelters can recover zinc without adding new equipment.

(2) Manual sorting and recycling technology: dry batteries are sorted and then simply cut open mechanically to manually separate the zinc skin, plastic cover, carbon rod, etc., and the remaining Mn02, manganese stone and other mixtures are sent back to the brick kiln for calcination. into dehydrated Mn02, this method is simple and easy, but it takes more labor and has little economic benefit.

(3) Lithium-ion batteries for new energy vehicles have high requirements. When the capacity of lithium-ion batteries decays below 80%, they cannot meet the demand; we can use lithium-ion batteries in other fields by using cascade usage, such as supplying for communication base stations Power support, or supply power for low-speed new energy vehicles, and store energy for power supply systems with lower requirements.

Discarded lithium-ion batteries contain a large amount of non-renewable metal resources with high economic value, such as cobalt, lithium, nickel, copper, aluminum, etc. If the discarded or unqualified lithium-ion batteries can be effectively recycled, it will not only reduce waste files The pressure of the battery on the environment can also prevent the waste of metal resources such as cobalt and nickel. If lithium-ion batteries can be recycled, 95% of the components can be used in the manufacture of new batteries or used in other industrial fields.