The mystery of lithium battery fast charge -Lithium - Ion Battery Equipment

Introduce the mystery of lithium battery fast charging and the principle of charging and discharge -Lithium - Ion Battery Equipment

The principle of charge and discharge of lithium -ion batteries.

To understand the mystery of the fast charging of lithium -ion batteries, we must first know the charging and discharge principle of lithium ion battery.

The battery has a bipolar: the positive electrode is a lithium compound with a negative extremely graphite.

Charging and discharge are the mutual conversion of electrical energy and chemical energy. During the lithium ion, it is also turning into different compounds during the positive and negative electrode motion.

In the ideal state, as long as the chemical structure of the positive and negative pole material does not change, the reversibility of the battery charging and discharge is very good, and the lithium -ion battery can ensure long -term circulation.

The principle of different methods of fast charging

There are many charging methods for lithium -ion batteries. For fast charging requirements, I will introduce to you here that several lithium -ion battery fast charging methods include pulse charging, Reflex charging, and intelligent charging.(Lithium - Ion Battery Equipment)

▼ pulse charging

Pulse charging is divided into three parts: CCPRE-Charge, large current constantcharge, and constant voltage charging (CV).

The voltage of lithium -ion battery is reduced after the power consumption of the power. When it is lower than a certain value, the charger will use a relatively low current to pre -charged the lithium ion battery, and some energy will be transferred to the inside of the battery.

After a period of time, after the voltage of the lithium -ion battery is higher than the scheduled value, it enters the second stage of large current constant current charging. At this time, the battery voltage will continue to rise, and the voltage will slowly decrease when the charging stops.

When the battery voltage drops to the upper limit voltage, charging the battery with the same current value at the same current value, and start the next charging cycle, so the circulating charging until the battery is full.

During the pulse charging process, the battery voltage decreases slowly, and the stop charging time T0 will become longer. When the constant current charging duty cycle is as low as 5%to 10%, the battery is considered to be full and charging.

Compared with conventional charging methods, pulse charging energy is charged with large current, and the strong polarization and Ohmization of the battery during the stopping period will be eliminated, making the next round of charging more smoothly, the charging speed is fast, the charging speed is fast, the charging speed is fast, the speed of charging is fast, and the charging speed is fast, and the charging speed is fast. The change in temperature is small, the effect of the battery life is small, so it is currently widely used.



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