To check whether the 18650 battery is damaged, the method is as follows:
1. The label of the verified 18650 lithium-ion battery confirms that its output voltage is 3.7V, but the capacity may be higher or lower than 2000mAh (some are 3000mAh) 2. Look for the positive and negative terminals of the 18650 lithium-ion battery. The round button-like shape of the battery is the positive terminal of the battery. battery, and the flat bottom position is the negative terminal.
3. Use a multimeter to check the output voltage. Make sure it is set to measure voltage. Place the small metal rod at the end of the red cable onto the positive terminal of the 18650 lithium-ion battery. Place the metal rod at the black end of the multimeter onto the negative terminal of the battery.
4. Display the multimeter display panel. If the battery is in normal condition, it should read between 3.6 and 3.7 V.If the reading is below 3.5V, fully charge the battery. If it is still below 3.5V after charging, that means you need to replace it, as these are signs that the battery charge is slowly diminishing.
5. Check the battery capacity, set the multimeter to measure the amount of current flowing per hour, and place the two metal rods on the positive and negative metal ends of the battery.
6. Check the multimeter display. The mAh of a fully charged 18650 Li-ion battery as labeled indicates that the battery is in good condition.
A battery protection board must be installed.
At present, lithium batteries generally have built-in PTC, but in order to protect the safety of the battery, a battery protection board must be installed.
When manufacturing a mobile power supply, you should pay attention to the insulationon, install the card correctly and avoid being crushed and deformed. You can also purchase a power supply from a conventional manufacturer.
"Lithium battery" is a type of battery that uses lithium metal or lithium alloy as the negative electrode material and uses non-aqueous electrolyte solution. Lithium metal batteries were first proposed and studied by Gilbert N. Lewis in 1912. In the 1970s, M. S. Whittingham proposed and began studying lithium-ion batteries. Since the chemical properties of lithium metal are very active, the processing, storage and use of lithium metal are subject to very high environmental requirements. Therefore, lithium batteries have not been used for a long time. With the development of science and technology, lithium batteries have now become mainstream.