Proper Usage Of Lithium Battery

Although lithium-ion batteries rarely have the memory effect of nickel-cadmium batteries, the principle of the memory effect is crystallization, and almost no such reaction occurs in lithium batteries. However, the capacity of lithium-ion batteries will still decrease after multiple charging and discharging. The reasons are complex and diverse. It is mainly the change of the positive and negative electrode materials. From the molecular level, the hole structure that contains lithium ions on the positive and negative electrodes will gradually collapse and block. From a chemical point of view, the positive and negative electrode materials are activated and passivated. Other compounds. Physically, the positive electrode material gradually peels off, etc. In short, the number of lithium ions in the battery that can be freely moved during the charge and discharge process is eventually reduced.

Overcharge and overdischarge will cause permanent damage to the positive and negative electrodes of lithium-ion batteries. From a molecular level, it can be intuitively understood that overdischarge will cause the negative electrode carbon to release lithium ions excessively and cause its sheet structure to collapse. Overcharging will force too many lithium ions into the carbon structure of the negative electrode, and some of them can no longer be released. This is why lithium-ion batteries are usually equipped with charge and discharge control circuits.

Unsuitable temperatures will trigger other chemical reactions inside the lithium-ion battery to generate compounds we do not want to see, so a protective temperature-controlling separator or electrolyte additive is provided between the positive and negative electrodes of many lithium-ion batteries. When the battery temperature rises to a certain level, the membrane hole of the composite membrane is closed or the electrolyte is denatured, the internal resistance of the battery increases until it is disconnected, and the battery no longer heats up to ensure that the battery charging temperature is normal.

Our views on battery maintenance are: 1. Do not deliberately ensure that each time the battery is discharged and recharged. 2. Deep charge and discharge under the control of the protection circuit can be done for a period of time to modify the battery power statistics, but this will not improve The actual capacity of your battery. 3. Batteries that have not been used for a long time should be placed in a cool place to reduce the speed of the internal passivation reaction. 4. The protection circuit is also incapable of monitoring the self-discharge of the battery. For long-term unused batteries, a certain amount of power should be charged to prevent damage caused by excessive self-discharge of the battery during storage. In fact, the battery does not have much attention to use, in other words, it is not very useful. How many times a battery can be used may be more a result of individual differences in the battery's manufacturing than the method of use.