Lithium-ion battery

Lithium-ion battery

Lithium-ion battery (Li-ion Batteries) developed from a lithium battery Laptop Battery. Therefore, introducing the Li-ion, before introducing lithium batteries. For example, previously used button batteries inside the camera belongs to Li-ion battery. Lithium battery cathode material is manganese dioxide, or thionyl chloride, lithium anode. After the completion of the battery assembly that is the battery voltage, without charge. Such cells may also be charged, but the cycle performance is not good, in the charge-discharge cycle, the easier the formation of lithium dendrite, causing internal short-circuit the battery, so under normal circumstances in which such the battery charging is prohibited. Later, Japan's Sony Corporation has come to carbon materials as the anode, lithium-containing compounds in order to make positive, in the charge-discharge process, there is no lithium metal, and only lithium-ion, which is lithium-ion battery. When charging the battery when the battery on the positive lithium ion generation, resulting lithium-ion movement through the electrolyte to the M8511 cathode. As the carbon anode layered structure, it has a lot of micro, to lithium-ion on the anode embedded in porous carbon layer, the embedded lithium-ion the more the higher the charge capacity. Similarly, when the battery discharge (ie, the process we use the battery), embedded in the carbon cathode layer of lithium-ion extrusion, but also movement back to positive. Back to the cathode of lithium-ion the more the higher discharge capacity. We usually say that the battery capacity is the discharge capacity. In the Li-ion charge-discharge process, lithium-ion transition from the positive → negative → positive moves in space. Li-ion Batteries is like a rocking chair, rocking chair at both ends of the battery poles, while theA1012 lithium-ion rocking back and forth as players do run. Therefore, Li-ion Batteries also known as rocking chair batteries.

[Edit this paragraph] lithium-ion battery cell components

Steel / aluminum Series:

(1) battery cover from top to bottom

(2) positive - active substances usually lithium cobalt oxide

(3) diaphragm - a special kind of composite membrane

(4) negative - active substances for the carbon

(5) Organic electrolyte

(6) Battery shell (divided into two kinds of steel and aluminum)

Flexible Series

(A) positive - active substances are generally lithium cobalt oxide

(2) diaphragm - PP or PE composite film

(3) negative - active substances for the carbon

(4) Organic electrolyte

(5) Battery shell - aluminum composite films

[Edit this paragraph] lithium-ion battery - Principles of Deconstruction

[1] Li-ion battery system is divided into lithium PowerBook G4 15inch battery and lithium-ion battery. At present the use of mobile phones and notebook computers are lithium-ion battery, usually people are commonly known as the Li-Ion battery. Currently mobile phones use lithium ion batteries, lithium batteries because of the real risk of large, does not apply to everyday electronic products.

Lithium-ion battery cathode materials with carbon in order to make positive electrode containing lithium compounds, there is no lithium metal, and only lithium-ion, which is lithium-ion battery. Lithium-ion battery refers to the lithium-ion intercalation compound as cathode material for battery general. Lithium-ion battery charge and discharge process, that is, lithium-ion intercalation and de-embedding process. In the lithium-ion intercalation and de-embedding process, accompanied with the electronic equivalent of lithium-ion intercalation and de-embedded (customary to use embedded or de-embedded positive that, while the PowerBook G4 negative electrode, said plug with the insertion or removal). In the charge-discharge process, lithium-ion in the positive and negative round-trip between the embedding / de-embedding and insertion / de-inserted, is vividly called the "rocking chair batteries."

Lithium-ion battery energy density, the average output voltage is high. Self-discharge is small, below 10% per month. No memory effect. Wide operating temperature range of -20 ℃ ~ 60 ℃. Cycle performance is superior, fast charge and discharge, charge efficiency of up to 100% and output power. Long service life. There is no environmental pollution, known as the green battery.

Charging is an important step in re-use batteries, lithium-ion battery charging process is divided into two phases: constant current fast charge phase (light red or yellow) and constant-voltage current descending phase (light green). Constant-current fast-charge stage, the PowerBook G3 battery voltage gradually rises to the standard battery voltage, and then transferred to constant pressure in the control phase of the next chip, the voltage will not rise in order to ensure that no over-charge, current battery, along with the gradual weakening of the increase in to 0, and the ultimate completion of charging. Statistics chip power consumption can be sampled by recording the discharge curve to calculate the battery capacity. Lithium-ion batteries in multiple use, the discharge curve will change, lithium-ion battery while there is no memory effect, but it will seriously affect the battery charging improper performance.

Lithium-ion battery over charge and discharge would have positive and negative result in permanent damage. Led to excessive discharge of carbon anode lamellar structure is collapsed, while the collapse will cause the process of charging lithium-ion can not be inserted; over-charging so much carbon anode of lithium ion embedded in the structure, while the result of which part of the M7318 lithium-ion can no longer be released.

Charge is equal to the charge current multiplied by the charging time, in the charge control voltage of certain circumstances, the greater the charge current (faster charging), charging the smaller power. Battery charging too fast and end-point voltage control properly, also lead to lack of battery capacity, the actual part of the battery electrode active material has not been fully respond to stop charging, the charging shortage increases with the number of cycles increased.