How to make your own lithium-ion batteries for electric vehicles

METHODS One, special solvents and adhesives for pulping were mixed with powder type positive and negative active substances, and after high speed mixing, the positive and negative polar substances were formed.

Methods Second, the slurry was evenly coated on the surface of the foil, dried, and made into positive and negative polar films respectively.

Method 3. The assembly is arranged in the order of the positive-diaphragm-negative-diaphragm from top to bottom, and the battery core is wound and then injected into the electrolyte, seal and other process, that is, the battery The assembly process is completed and the finished battery is made.

Methods Fourth, the battery charge and discharge test was carried out on the finished battery with the special battery charge and discharge equipment. Each battery was tested, and the qualified finished battery was screened.

Lithium batteries are batteries that use lithium metal or lithium alloys as negative electrode materials and use non-aqueous electrolyte solutions. The earliest scientist who invented lithium batteries was Edison. Of course, now that people are completely familiar with lithium batteries, especially after they are widely used in vehicles such as automobiles and electric vehicles, people's attention to lithium batteries has been upgraded.

Classification of lithium batteries

1, according to the internal material lithium batteries are usually divided into two categories:

Lithium metal batteries: Lithium metal batteries generally use manganese dioxide as a positive material, lithium metal or its alloy metal as a negative material, and batteries using non-aqueous electrolyte solutions.

Lithium-ion batteries: Lithium-ion batteries generally use lithium alloy metal oxides as positive materials, graphite as negative materials, and batteries using non-aqueous electrolytes.

Although the energy density of lithium metal batteries is high, it can theoretically reach 3,860 watts per kilogram. However, due to its unstable nature and inability to charge, it can not be used as a power battery for repeated use. The lithium-ion battery has been developed as a major power battery because of its ability to repeatedly charge. However, because of its different elements, the composition of positive polar materials varies greatly in various aspects, resulting in an increase in disputes over the positive material route in the industry.

lithium iron phosphate batteries, lithium manganate batteries, lithium cobalt acid batteries, and lithium ternary batteries are the most commonly used power cells.

2, by use; It can also be divided into two categories:

The first is the digital battery, which is our daily mobile phone, tablet, mobile power, etc.. These are all digital batteries.

The second type is power batteries, which are powered by Tesla, some new energy electric vehicles from BYD, and batteries for products such as drones. These batteries require a lot of instantaneous current, and digital batteries can not meet the instantaneous high current, so this type of battery is also called a high rate battery. The price is more expensive than digital batteries.

3, according to the shell material, can be divided into three categories:

The first type, the steel shell battery, as its name implies, is the steel shell.

The second type, aluminum shell batteries, the same shell is aluminum material.

In the third category, the polymer battery, the shell is a polymer material, mostly silver, a few manufacturers are made of black, the industry became black skin.

4, by shape is also three categories:

The first type is cylindrical batteries, which are used in many ways, such as 18650, 26650, etc.. This general combination is used. The relatively few combinations can be used as digital products, such as early notebook computers, generally 8 18650, mobile power sources, One to five or six different combinations, There are also more than 7,000 series parallel combinations of 18650 by Tesla.

Second, Square batteries, which are mostly polymer batteries, because this polymer is very malleable, can make many shapes, and can be adjusted at will. Most digital products now use such batteries.

The third type, special-shaped batteries, are some odd-shaped batteries. According to the needs of the product, the battery also has to match the shape, such as the smart wearable product that is now popular, such as the smart bracelet is circular, so the battery is also made into a ring.

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