The method is as follows:
1. Use versatile test instruments. You can use multi-purpose test instruments, battery capacity testers, and current and voltage testers to read and monitor lithium battery data. .
2. Use the battery protection board display screen. Some battery protection boards are equipped with an independent display screen that can display battery voltage, current and power data.
3. Use a battery tester. There is a special battery tester that can be connected to the lithium battery and read battery information through the connection interface.
The electric car shows 3 bars of remaining power and the lithium battery shows 30% of the remaining power. The electric car is running out of power. The battery of the 10,000 electric vehicle has a clow load and the battery level on the meter cannot be judged accurately. Typically, the battery shows full charge when fully charged. The electric vehicle is also fully charged when not driving. There are three bars of electricity when you are not riding, it means the battery is fully charged, and it immediately drops to a level when accelerating.
Theoretically, the pointer type battery indicator is as follows: the dial is divided into 3 zones: green, yellow and red. If the watch hand is on the green grid while driving, the battery level is around 100 to 80 percent; if the pointer is on the yellow grid, the battery level is between 70 and 50 percent; red grid, the battery level is at 100% about 30% of the time, you can't drive it anymore and need to charge it, otherwise it will damage the battery.
Repair principle:
The lifespan of lithium batteries is about 600 times. If the charging times are too long, the thermal movement of molecules will gradually destroy the microstructure of the internal molecular arrangement and the charge storage efficiency will gradually decrease.
And "The freezing process can easily destroy the original internal structure of the battery. It can increase the charging capacity in a short time, but it may not be effective for long time use term." Once the microstructure of the lithium battery is destroyed, it will no longer be used. It is impossible to recover it completely, and long-term use of this method will accelerate the loss of cell phone battery.
Reference for the above content: Baidu Encyclopedia - Lithium Battery