Zhengzhou Zhengyang Machinery Equipment Co., Ltd

Features of lithium battery pole piece processing equipment


Lithium batteries are mainly composed of an outer shell, a positive electrode, a negative electrode, an electrolyte and a separator. The positive electrode is composed of PVDF that is used as a binding agent to coat lithium cobalt oxide powder on both sides of the aluminum foil current collector; the structure of the negative electrode is similar to that of the positive electrode and is made of carbon powder. It is formed on both sides of the copper foil current collector. Lithium-ion batteries have significant advantages such as high voltage, large specific capacity, long life and no memory effect. Since their commercialization, they have quickly occupied the power source market for portable electronic and electrical equipment, and their output has increased year by year. The service life is about 2 years. If the discarded lithium battery is improperly handled, the lithium hexafluorophosphate, carbonate organics and heavy metals such as cobalt and copper will inevitably pose a potential pollution threat to the environment. On the other hand, cobalt, lithium, copper and plastics in waste lithium batteries are precious resources and have extremely high recycling value. Therefore, scientific and effective treatment of waste lithium batteries not only has significant environmental benefits, but also has good economic benefits.

Lithium Battery Recycling Machine

Lithium Battery Recycling Machine

At present, researches on the recycling of waste lithium batteries are mainly focused on the recovery of valuable cathode precious metals cobalt and lithium, and there are few reports on the separation and recovery of anode materials. In order to alleviate the increasingly serious resource shortage and environmental pollution caused by the rapid economic development, it has become a global consensus to realize full-component recycling of waste materials.

The copper in the negative electrode of lithium batteries (with a content of about 35%) is a widely used important production raw material, and the carbon powder adhered to it can be used as an additive for plastics, rubber, etc. Therefore, the effective separation of the negative electrode constituent materials of the waste lithium battery, the realization of the recycling of the waste lithium battery, and the elimination of its corresponding environmental impact have a driving effect. Commonly used methods for recycling waste lithium batteries include hydrometallurgy, pyrometallurgy, and mechanical and physical methods. Compared with wet method and fire method, mechanical physical method does not require the use of chemical reagents, and has lower energy consumption. It is an environmentally friendly and efficient method. Based on the structural characteristics of the negative electrode of the lithium battery, a combined process of crushing and screening and airflow separation is used to carry out separation and enrichment research to realize the efficient separation and recovery of copper, aluminum and carbon powder in the negative electrode of the waste lithium battery.

Features of lithium battery pole piece processing equipment:

1. The combined process of hammer crushing, vibrating screening and airflow sorting can realize the resource utilization of metal copper and carbon powder in the anode material of waste lithium batteries;

2. The negative electrode material can be effectively separated between the carbon powder and the copper foil through hammer vibration, and then the copper foil and the carbon powder can be separated by the vibration sieving based on the difference in size and shape between the particles;

3. For crushed particles with a particle size of 0.125~0.250 mm and a low copper grade, airflow sorting can be used to achieve effective separation between copper and carbon powder. When the airflow velocity is 1.00 m/s, a good recovery effect can be achieved. ;

4. This equipment is mainly used by lithium-ion battery manufacturers to separate aluminum and copper from the anode and cathode materials in the scrapped anode and cathode sheets for recycling purposes. The complete set of equipment operates under negative pressure, no dust leakage, and the separation efficiency can reach more than 90%.

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