Why is the price of 18650 lithium battery so different?

Why is the price of the 8650 lithium battery so much worse? 18 is 18mm in diameter, 65 is 65mm in height, 0 is a cylindrical battery.

The nominal voltage of a single section is generally: 3.6V or 3.7V

The charging voltage is generally: 4.20V (lithium cobaltate is 4.2V-4.3V)

The small discharge termination voltage is generally 2.75V. Below this voltage, the battery capacity is seriously degraded and even scrapped.

Charge termination voltage: 4.20V

Diameter: 18±0.2mm

Height: 65±2.0mm

Capacity: 1000mAh or more, the conventional capacity is 2200mAh-3200mAh, the current 18650 battery capacity is done by LG, can achieve 3600mAh, but the price is not low.

How many lithium battery manufacturers are there in Henan Province?

In order to prevent battery short circuit, the positive and negative poles of the 18650 lithium battery are separated. So the possibility of its short circuit has been reduced to the extreme. A protective plate can be added to prevent the battery from overcharging and over-discharging, which also extends the battery life. 4. High voltage: The voltage of 18650 lithium battery is generally 3.6V, 3.8V and 4.2V, which is much higher than the 1.2V voltage of NiCd and NiMH batteries.

18650 lithium battery advantages

1. The capacity of 18650 lithium battery is generally between 1200mah and 3600mah, while the general battery capacity is only about 800. If you combine 18650 lithium battery to 18650 lithium battery pack , then the 18650 lithium battery pack can be broken casually. 5000mah.

2. Long life The long life of 18650 lithium battery is very long. The cycle life can reach more than 500 times in normal use, which is more than twice that of ordinary batteries.

3. High safety performance 18650 lithium battery has high safety performance, no explosion, no burning; no toxicity, no pollution, RoHS certified; various safety performances in one go, cycle times greater than 500 times; high temperature resistance, 65 degrees The discharge efficiency is up to 100%. In order to prevent battery short circuit, the positive and negative poles of the 18650 lithium battery are separated. So the possibility of its short circuit has been reduced to the extreme. A protective plate can be added to prevent the battery from overcharging and over-discharging, which also extends the battery life.

4. The voltage of the 18650 lithium battery is generally 3.6V, 3.8V and 4.2V, which is much higher than the 1.2V voltage of NiCd and NiMH batteries.

Lithium batteries* were first used in pacemakers. The lithium battery has a very low self-discharge rate and a flat discharge voltage, so that the pacemaker implanted in the human body can operate for a long time without recharging. Lithium batteries generally have a nominal voltage higher than 3.0 volts, making them more suitable for use as integrated circuit power supplies.

The general lithium battery quality standard is at least 300 charge and discharge cycles.

Generally speaking, after 10 charge and discharge, the capacity is only 90% of the initial value. After 300 times, the capacity will become about 70% of the original value, and then gradually decrease.

Day can not forget the pain | General Manager of Engineering Information Department | Released on 2017-06-14 Report | Comments (2) 75

The capacity type of the 18650 lithium battery can now be 2500mAh, and the rate type battery can be used for 2C normal use charging and discharging. Therefore, the power can be very large. In addition, the material properties of the lithium-ion battery determine its nominal voltage of 3.7V, and the voltage can be charged and discharged when the voltage range is between 2.9 and 4.2V. Why is the price of the 18650 lithium battery as the cathode material so much worse? Metal lithium ion compounds, high energy density, with the continuous development of metal active metal compound materials, energy density continues to increase, coupled with optimized battery manufacturing processes, the use of fully automated production equipment, capacity and room for improvement.

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