Correct Useing Of Lithium Ion Batteries

Although lithium-ion batteries have little memory effect of nickel-cadmium batteries, the principle of memory effect is crystallization, and this reaction is hardly produced in lithium batteries. However, lithium-ion batteries still have a reduced capacity after multiple charge and discharge cycles, which are complicated and diverse. Mainly the change of the positive and negative materials themselves. From the molecular point of view, the hole structure containing lithium ions on the positive and negative electrodes will gradually collapse and block; from the chemical point of view, the positive and negative materials are reactively passivated, and the side reaction is stable. Other compounds. Physically, the positive electrode material gradually peels off, and finally, the number of lithium ions in the battery that can freely move during charge and discharge is finally reduced.

Overcharging and over-discharging will cause permanent damage to the positive and negative electrodes of lithium-ion batteries. From a molecular perspective, it can be intuitively understood that excessive discharge will cause the anode carbon to release lithium ions excessively, causing the sheet structure to collapse. Overcharging will hardly plug too much lithium into the negative carbon structure, and some of the lithium ions will no longer be released. This is why lithium-ion batteries are usually equipped with a charge and discharge control circuit.

Unsuitable temperatures will cause other chemical reactions inside the lithium-ion battery to form compounds that we do not want to see, so there are protective temperature-controlled separators or electrolyte additives between the positive and negative electrodes of many lithium-ion batteries. When the temperature of the battery is raised to a certain extent, the pores of the composite membrane are closed or the electrolyte is denatured, and the internal resistance of the battery is increased until the circuit is broken, and the battery is no longer heated to ensure that the charging temperature of the battery is normal.

Our view on the maintenance of the battery is: 1. Do not deliberately ensure that each time the battery is discharged and recharged. 2. For a period of time, you can do a deep charge and discharge under the control of the protection circuit to correct the battery's power statistics, but this will not improve. The actual capacity of your battery. 3. Long-term unused batteries should be placed in a cool place to reduce the speed of their internal passivation reaction. 4. The protection circuit is also unable to monitor the self-discharge of the battery. The battery that has not been used for a long time should be charged with a certain amount of power to prevent the battery from being over-discharged due to excessive discharge during storage. In fact, there is not much use in the battery to pay attention to, in other words, it is not too much to consider. How many times a battery can be used, perhaps more different from the individual differences in the manufacture of the battery itself, rather than the method of use.