In our daily life, we use some electrical equipment, often by the battery to provide power, and lithium batteries are one of our commonly used batteries. But many people may feel strange to lithium batteries, let us look at the knowledge of lithium batteries today.
What materials are needed to manufacture lithium batteries?
1. Lithium metal batteries: usually made of manganese dioxide, lithium or lithium alloy and non-aqueous electrolyte as the main raw material. It has the advantages of low manufacturing cost, non-toxicity, good thermal stability, etc. The disadvantage is low energy density.
2. Lithium-ion battery: usually made of aluminum metal alloy oxide, graphite and non-aqueous electrolyte. Its main advantages: high energy density, can be repeatedly rechargeable use, high range. The disadvantages are poor thermal stability (i.e., unstable performance at higher temperatures), longer charging time at low temperatures, and limited-service life.
How are lithium batteries manufactured?
People usually choose to use different materials to manufacture the lithium batteries according to the required battery capacity, voltage, etc. Although there are slight differences in the specific steps, the whole can be divided into the following major steps.
1. Electrode slurry preparation: Prepare the required materials in advance, and then Mix and disperse the required electrode active materials, binder and solvent to complete the preparation of electrode slurry.
2. Coating: The electrode slurry is evenly coated on copper foil or aluminium foil (academically known as the collector), and then dried at a later stage.
3. Punching: Cutting the electrode sheet into the desired size and shape according to the need.
4. Stacking: The two poles are mounted together and then glued together, usually referred to as the core.
5. Assemble the battery: put the core into the appropriate aluminium film and seal the top and side sealing treatment.
6. Liquid injection: inject the prepared electrolyte into the inside of the cell.
7. Battery sealing: use an air extractor to extract the air inside the battery in a vacuum environment and pay attention to sealing treatment.
8. Activation: activate the prepared battery, carry out inspection, eliminate the unqualified lithium batteries, leaving the lithium batteries that meet the requirements.
9. Formation: the selected battery through the current, activate the active Material in the battery, so that it can discharge normally, can not be normal discharge of the battery out.
10. Separation of capacitance: As each lithium battery in the manufacturing process will produce some differences, which also leads to most of the lithium battery capacitance is not completely consistent. Then the battery will be categorized according to the different capacitance.
Summarize
lithium batteries make an indispensable part of our lives, I hope that through the above, we can let you have a clearer understanding of lithium batteries.
