How to judge the charging battery

　　Author ：Iflowpower – Portable Power Station Supplier

1, lithium ion battery nominal voltage 3.7V (3.6V), charging cutoff voltage 4.

2V (4.1V, different designs based on cells). (The state of the lithium-ion battery is: lithium ion secondary battery) 2, charging the lithium ion battery (GB / T182872000 specification): First constant current charging, that is, the current is constant, and the battery voltage gradually increases with the charging process.

When the battery terminal voltage reaches 4.2V (4.1V), the constant current charge is constant voltage charging, that is, the voltage is constant, the current is based on the saturation of the battery, and as the charging process continues to decrease, when it is reduced to 0.

01C When it is considered to be terminated. (C is a way of representing a battery-nominal capacity control current. If the battery is 1000mAh capacity, 1C is a charging current of 1000mA, paying attention to MA instead of mah, 0.

01c is 10mA. Of course, the specification means is 0.01c5a, and I am simplified here.

3, why think 0.01c is over the charging: This is the national standard GB / T18287-2000, which is also discussed. Everyone in the past, it is also the end of 20mA.

The standard YD / T998-1999 of the Ministry of Posts and Telecommunications is also specified. The 0.01c specified in the national standard will help the charging is more full, and the manufacturer is favorable.

In addition, the national standard specified that the charging time was not more than 8 hours, that is, even if it has not reached 0.01c, 8 hours arrive, it also believes that charging ends. (Nothing battery, there should be 0.

01c in 8 hours, battery, no good quality, etc. The cutoff parameter of the protective plate is 4.35V (this is still good, the difference is 4.

4 to 4.5V), and the protective board is to pay, if each time is full, the battery will be attenuated quickly.