Battery functional principle

Charging

During charging, the lithium-ions migrate through the electrolytes to the negative electrode. At the negative electrode, the lithium-ions react to form lithium atoms. This reaction takes place with the help of the electrons that are transported to the electrode via the outer current path. The lithium atoms insert themselves in the layers of the negative electrode material.

Discharging

The reverse process occurs during discharging. The lithium atoms change into lithium-ions by releasing an electron. These migrate through the separator back to the positive electrode. At the positive electrode, the lithium-ions react with the electrons to form lithium atoms. The lithium atoms insert themselves in the structure of the positive electrode material.

Separator