The principle of lithium-ion battery and charger

from the anode to reach the lithium-ion battery cathode. Lithium ion to move between the anode and cathode, the electrode itself does not change. This is the lithium-ion batteries

and lithium batteries difference in the nature. Lithium-ion battery Uniwill 223-3s4000-s1p1 battery anode graphite crystal, lithium oxide cathode usually. Charging, the cathode of lithium atoms into lithium-ion and

electron ionization, and the lithium ions to the anode of lithium atoms and electronic synthesis. Discharge, the lithium atoms from the graphite anode surface ionization into a

crystal of lithium ions and electrons, and in the synthesis of the cathode of lithium atoms. So, in the lithium battery is always in the form of lithium ion appears there will not be the

form of lithium, so that the battery is called lithium ion battery.

First, the lithium-ion battery charge and discharge characteristics

The AA-500mAh Li-ion battery charge and discharge curve. Single lithium-ion battery charging voltage is best kept at 4.1V +50 mV, the charge current is usually limited to 1C

(500mA) the following, otherwise it will cause permanent damage to the lithium-ion battery. Lithium-ion batteries commonly used constant current / constant voltage charging

mode, that is, first using a constant current of 1C charging, the battery voltage is rising, when up to 4.1V when the charger should be immediately transferred to constant voltage

(4.1V +50 mV), the charge current gradually decreases, when the battery is fully charged, the current dropped to trickle charge current. With this method, can be sufficient for

about two hours of battery (500mAh). Lithium-ion battery Compaq nc4200 battery discharge current shall not exceed 3C (1.5A), battery voltage should not be lower than single 2.2V, otherwise it will cause

damage. By 0.2C discharge current, battery voltage drops to 2.7V, the rated battery capacity can be released (500mAh), with 1C discharge current, the battery can discharge

90% of battery capacity, while the environment temperature on the battery discharge capacity is also will have an impact, it provides a lithium-ion battery discharge when the

temperature is -20 ? ~ +60 ?. A characteristic of lithium-ion battery is easier to display the remaining electricity, because the lithium-ion battery voltage slowly decreased with

time, lithium-ion battery discharge starting voltage of 4.1V (4.2V), the discharge termination voltage of 2.5V.

Second, the advantages and disadvantages of lithium ion batteries

Advantages: 1. High voltage; 2. Small size, light weight, high energy; 3. Long life; 4. Safe and fast charging; 5. To allow a wide temperature range; 6. Discharge current is small, no

memory effect, no pollution .

Disadvantages: 1. And battery-free interchangeability; 2. Not fast charge; 3. Internal impedance is high; 4. The work of a large voltage change; 5. Discharge rate is large, the

capacity dropped rapidly, not large current discharge.

Third, lithium-ion battery Mitac bp-8x99 battery charger

Here a new type of lithium-ion battery charger module PS1719, which uses constant current / constant voltage control of lithium-ion batteries. Constant current, easy to adjust to

the charge current is reduced to the maximum current (CC) 15% of the full identification reference, and terminate the charge. There are also charging display and full display.

PS1719 module voltage is 9V, the internal structure.

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