Daily care and maintenance of lithium batteries

New method of charging lithium-ion batteries for electric vehicles, principles of lithium-ion battery charging.

In recent years, electric vehicles have become more and more popular among consumers, but battery failure of electric vehicles has become a problem that bothers consumers. So, let me introduce the new lithium-ion battery charging method and charging principle for electric vehicles.

Lithium-ion batteries for electric vehicles.

The correct way to charge a new lithium-ion battery for the first time

First of all, if it is a lithium-ion battery that is being charged for the first time in a new electric vehicle, do not completely drain it before recharging it. Please do not drain the battery, this will have a great impact on battery life.

Secondly, when charging an electric vehicle battery for the first time, the charger may get hot quickly. Therefore, especially in summer, when charging, the charger is prone to heat and can easily ignite objects. It is best not to place the battery on the saddle to prevent fire. Because many people will have the battery car spontaneously ignite when charging, please be careful.

Finally, after charging a new electric car battery for the first time, it is best to deeply discharge the battery once a month. This will be of great benefit to the power recovery of electric vehicle batteries.

Lithium-ion battery charging principle

The accepted basic principle of lithium-ion batteries is the so-called rocking chair theory. The charging and discharging of lithium-ion batteries is not achieved through traditional electron transfer, but through strong materials in which lithium ions move in and out of the crystal layer, and the energy changes. Under normal charge and discharge conditions, the entry and exit of lithium ions generally only causes changes in the interlayer spacing, but does not cause damage to the crystal structure. Therefore, from the perspective of charge and discharge reflection, lithium ion batteries are an ideal reversible battery. During the discharge process of lithium ions, lithium ions move back and forth between the positive and negative electrodes of the battery, just like a rocking chair rocking between the positive and negative electrodes of the rocking chair, so some people call lithium ion batteries rocking chair batteries.

As we often say, the advantages of lithium-ion batteries are unique to traditional nickel-cadmium (Ni/Cd) and nickel-metal hydride (Ni/MH) batteries. It has the advantages of high operating voltage, high specific energy, long cycle life, low self-discharge rate, and no memory effect.

Lithium-ion battery discharge precautions

●The discharge current should not be too large. Excessive current will cause internal heating of the battery and may cause permanent damage;

●Do not discharge excessively. Lithium-ion batteries are most afraid of over-discharge. When the discharge voltage is lower than 2.7v, the battery may be scrapped.

Routine care and maintenance of lithium-ion batteries

Lithium-ion batteries have very low self-discharge and can generally be stored for 3 years. The effect will be better if stored under refrigerated conditions. It's a good idea to store lithium-ion batteries at low temperatures. Lithium-ion batteries have a low self-discharge rate and can be stored for more than half a year at 20°C, and most of their capacity can be recovered. Lithium-ion batteries have self-discharge. If the battery voltage remains below 3.6V for a long time, it will cause the battery to over-discharge, damage the internal structure of the battery, and reduce battery life.

Therefore, long-term use of lithium-ion batteries should be replenished every 3-6 months, that is, the charging voltage is 3.8-3.9v (the optimal storage voltage of lithium-ion batteries is about 3.85v), and should not be fully charged. Lithium-ion batteries can be used in a wide range of temperatures. They can still be used outdoors during northern winter, but their capacity will be greatly reduced.

Electric cars use lithium-ion batteries incorrectly

Blindly pursuing 12 hours of charging and lithium-ion battery power is the wrong way to use it. If you acted on an incorrect statement, please correct it promptly.

The above is an introduction to the precautions for charging the electric vehicle battery for the first time. Lithium-ion batteries are increasingly used in simple electric bicycles. Finally, I would like to remind everyone: when charging, you should plug the plug into the electric vehicle and then connect it to the power supply. This is a good way to ensure stable battery voltage.