Analysis of Lithium Battery Recycling Technology

Release time:

2022-05-16 14:28

How to realize the harmlessness, reduction and resource utilization of waste lithium batteries is a top priority. The physical objects of recycling and reuse of lithium batteries are fully utilized to turn waste into treasure. Lithium battery refers to the battery containing lithium (including lithium alloy and lithium ion, lithium polymer) in the electrochemical system. Lithium battery is roughly divided into lithium metal battery and lithium ion battery. Then, let's understand the lithium battery recycling technology analysis!

Lithium battery structure:

Lithium battery structure usually has two shapes, cylindrical and square, the battery internal spiral structure, with a very fine, permeable polyethylene film will be isolated between the positive and negative. The positive electrode has a current collector composed of lithium cobalt oxide and aluminum foil. The negative electrode is composed of a current collector made of a graphitized carbon material and a copper foil. The battery is filled with an organic electrolyte solution.

Lithium battery recycling processing technology analysis:

1. Pretreatment of waste lithium batteries, including discharge, decomposition, crushing, and sorting; recycling of decomposed plastic and iron casings;

2. Waste lithium battery recycling equipment technology mainly uses mechanical crushing,

3. Through vacuum separation, vibration screening, specific gravity separation, air flow separation and other simple dry means, to achieve waste lithium battery electrode materials, current collector metal, plastic separator, battery shell separation and collection;

4. The separation and collection process does not introduce any chemical reagents, the entire process is automated, and the electrolyte, dust, etc. are collected and processed at the same time. It has the characteristics of high recovery efficiency, green low carbon, environmental protection and energy saving, and easy industrialization.

The general capacity maintenance rate of lithium batteries is below 70%. The energy density of mainstream material lithium battery is more than 3 times that of lead-acid battery, and the cycle life is more than 5 times that of lead-acid battery. The performance, volume and weight of the retired battery are far better than that of the new lead-acid battery, but the recycling cost of the retired battery is far lower than that of the new lead-acid battery. Therefore, the retired lithium battery, especially iron phosphate and lithium titanate, is the main direction of lead-acid lithium, as well as two-wheel, tricycle batteries, electric forklift batteries began to use a large number of retired power lithium batteries for cascade utilization.

The reason why consumer lithium batteries are seriously scrapped is mainly because consumer lithium batteries such as mobile phones and digital lithium batteries have small capacity, scattered storage, difficult to recycle, high cost, low income, and few recyclers. On the other hand, whether the retired on-board lithium battery is measured by several times of electricity or several tons. Trout on this scale, it's a good business. Therefore, retired lithium batteries and consumer lithium batteries are the same kind of life. With the development of power lithium battery recycling, the fate of retired consumer lithium batteries may also change.

Lithium battery recycling technology has strict qualification management, and a city often has only one or two enterprises with this qualification. According to the new method of processing scrapped auto parts in 2020, the five parts that are disassembled and recycled can be remanufactured. After the new energy vehicle is scrapped, its core parts can also be used as remanufactured parts. In particular, the high-value power lithium battery pack can be used for after-sales service of similar models, and can also be used for cascade utilization and recycling. How to realize the harmlessness, reduction and resource utilization of waste lithium batteries is a top priority. The physical objects of recycling and reuse of lithium batteries are fully utilized to turn waste into treasure.

The above is the lithium battery recycling technology analysis, if you need to know more, you can contact us at any time!

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