The Chemical Structure Of Lithium-ion Battery

Look at the chemical structure of lithium-ion battery: lithium cathode material is

usually composed of active compounds, the negative is a special molecular structure of carbon. Common cathode material mainly composed of LiCoO2, charging, plus the battery cathode polarization of the electric potential to force release of lithium-ion compounds, embedded negative elements arranged in lamellar structure of carbon. Discharge, the lithium-ion from the lamellar structure of the carbon in precipitation, and positive re-combination of compounds. Lithium-ion mobile rise to a current. Here is the impulse of a lithium-ion battery power curve (due to the charge time and capacity for reference only): (see photo)

Lithium-ion battery charging process is divided into two phases, constant current fast charge phase (usually when the battery indicator light yellow) and reduced voltage current phase (the battery indicator light is usually green). Constant current fast charge phase, the battery voltage gradually rises to the standard battery voltage, then under the control chip into the constant pressure phase, the voltage will not rise to ensure that no over charge and current increase gradually as the battery weakened to 0, and the final charge. Thus: When the charge indicator light is converted to "full" state, the actual battery charging circuit is still in a small current charge, until the battery is fully charged, current is 0 up. When the green light does not immediately disconnect charge.

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by: combattery

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