18650 lithium battery pack capacity measurement steps and advantages analysis

Advantages of 18650 lithium battery pack: 1. High safety performance 18650 lithium battery has high safety performance, no explosion, no burning; non-toxic, non-polluting, and has passed RoHS trademark certification; various safety performances can be achieved in one go, and the number of cycles is greater than 500; high temperature resistance Good performance, discharge efficiency up to 100 at 65 degrees. In order to guard against the battery short-circuit phenomenon, the positive and negative electrodes of the 18650 lithium battery are separated. Therefore, the possibility of short-circuit phenomenon may have been reduced to the extreme. A protection board can be installed to guard against overcharge and overdischarge of the battery, which can also extend the battery life. 2. The capacity of a large-capacity 18650 lithium battery is generally between 1200mah and 3600mah, while the general battery capacity is only about 800. If the 18650 lithium battery is combined to form an 18650 lithium battery pack, the 18650 lithium battery pack can be broken at will. 5000mah. 3. High voltage 18650 lithium battery voltage is generally 3.6V, 3.8V and 4.2V, much higher than the 1.2V voltage of nickel-cadmium and nickel-hydrogen batteries. 4. Long life The 18650 lithium battery pack has a long life, and the cycle life can reach more than 500 times in normal use, which is more than twice that of ordinary batteries. 18650 lithium battery pack capacity measurement method steps: 1. Formal method: use a lithium battery pack capacity tester, first charge to 4.20V, and then put it aside for 1 hour constant current discharge, the arbitration method is 0.2 times, such as 1000mAh capacity, with 200mA Constant current discharge discharge to 2.75V cut-off, calculation time time * constant current u003d battery capacity This is done in accordance with the national standard 18287 lithium battery regulations. If it is a nickel-metal hydride battery, the same is true, but the charging method is not constant voltage, and the discharge is cut to 1.0V per cell. This method requires special equipment. 2. Simple method of constant resistance discharge. To use a multimeter and high-power resistor, first charge it fully. You can charge it in a cradle, such as a phone or a mobile phone. Connect the battery full load to this resistor. Usually it can be a 10 ohm 5W cement resistor to discharge until the voltage is lower than 2.75V, to obtain the total discharge time capacity u003d 0.37A* time. This method is relatively simple, but there is a certain error. . Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.