Portable 12V Battery Pack Lithium Lifeo4 Rechargeable Battery

The power lithium-ion battery of new energy vehicles can be divided into secondary batteries (including lead-acid batteries, nickel-cadmium batteries, nickel-metal hydride batteries, lithium-ion batteries) and fuel-powered lithium batteries.

We refine it, starting from the classification of lithium-ion batteries, and introduce the mainstream technical routes of power lithium-ion batteries in the current market.

How it works

First of all, to correct a concept, lithium-ion batteries are usually divided into two categories according to the different materials used in the positive and negative electrodes:

Lithium metal batteries, that is, batteries that use manganese dioxide as the cathode material and lithium metal or its alloy metal as the anode material; Lithium-ion batteries, using lithium alloy metal oxide as the cathode material and graphite as the anode material battery.

The lithium-ion battery is composed of four parts: the positive electrode (containing lithium compound), the negative electrode (carbon material), the electrolyte, and the separator.

When the battery is charged, the lithium atoms on the positive electrode are ionized into lithium ions and electrons (deintercalation), and the lithium ions move to the negative electrode through the electrolyte to obtain electrons, which are reduced to lithium atoms and embedded in the micropores of the carbon layer (inserted);

When the battery is discharged, the lithium atoms embedded in the carbon layer of the negative electrode lose their electrons (de-inserted) and become lithium ions, which move back to the positive electrode (embedding) through the electrolyte.

The charging and discharging process of lithium-ion batteries, that is, the process of continuous intercalation and de-intercalation of lithium ions between the positive and negative electrodes, is accompanied by the intercalation and de-intercalation of equal equivalent electrons. The higher the number of lithium ions, the higher the charge-discharge capacity.