Recently, Bao Master came to Audi in the R & D center in Beijing 798, listening to a public class from “Volkswagen College”, the core content is to explain the Volkswagen in the German Salzji special plant and the Chinese market, Power Battery Circuit Using Pilot Project. Under the technical adherence to this project, the mass of the power battery in China can recycle up to 95%, while Germany can achieve nearly 100% recovery (5 percent differences mainly in the recovery of diaphragm materials).
The recycling of waste batteries has a crucial significance for the development of new energy vehicles. Unlike fuel vehicles, new energy vehicles although the structure is relatively simple, energy can be renewable, but when the vehicle is scrapped, the recycling process of raw materials is much more complicated. In particular, the power battery part contains a large amount of rare metals and chemicals. If the recovery is proper, not only the raw material can be recyclable, but also reduce the cost of use within the lifecycle of the vehicle (improved recovery price, and if the lossible parts can be replaced by recovery environmental protection materials); however, if it is improper, not only is more precious than expensive metals Disturbed, toxic hazardous substances in the battery will also cause serious damage to the environment.
On the other hand, if high proportional recovery can be achieved from the material level, it has an extremely important significance for the entire industry, or even the national strategic security. Usually we say that the ternary lithium battery and lithium iron phosphate cells refer to the positive material of the battery. The most used ternary lithium battery in China, the positive electrode material is mostly nickel-cobalt manganese and nickel-cobalt aluminum. These batteries contain precious metals such as nickel, lithium, and cobalt. Although China’s investment in Africa has a certain right to use, there is a certain voice, but the cobalt ore is still a significant proportion of imports, while the import of lithium ore is still more than 70%, of which about 50% from sitting Australia in the high quality lithium mine. Given the relationship between China and Australia, it is unclear. Therefore, if you can have a complete high recovery of the waste power battery recovery system, it is crucial for the development of my country’s new energy automotive industry.
The content of the public courses of the public college focused on the power battery back in my country and Germany.Take the system. In the full life of the public, the power battery starts from the battery, assembles the module, and then produces a battery pack, and is provided to the user. When the lithium-ion battery life is attenuated to 80% or less, the electrochemical performance of the battery will have a significant decline, it is difficult to fully meet the normal power demand of the car, and the battery enters the conventional replacement phase. Through its own maintenance system, the public reclaimed the power battery of its own brand products and unified test and discrimination. The battery is tested, and the public will grade it. Among them, the quality battery can be used in a ladder. Relatively low-quality batteries enter the regenerative recovery link.
The ladder will be made more detailed. The preferred battery will be used as a battery spare parts and replace the module level. Medium battery will be modified into a power battery for low-speed electric vehicles, which will be reduced to the electrical cell level. Low-haired batteries are used as energy storage or backup devices (such as photovoltaic power storage stations, or energy storage batteries of the light energy self-generating circuit lamps), this level of battery is all packaged or mode Group level is used. This further maximizes the life cycle of the battery, reducing waste and energy, environmental loss. At the same time, the powerful lithium-transportation cloud platform cooperated with the third-party enterprise can monitor the battery-to-direction and state of the ladder. Including intelligent ladder battery screening management platform, low speed lithium battery operation management platform and lithium battery trading platform, etc. Among them, the lithium battery trading platform can achieve battery aging data analysis, battery statistical display, operation management, asset management.
The battery that enters the regeneration link will also be classified. According to historical data and on-site test results, it is divided into a good state of the A-Class A, and Class B has a potential risk, and the Class C has three grades of fire or explosion. After the identification is complete, the battery is safely encapsulated. There is a battery in which high security hidden dangers uses an explosion-proof box package, and uses the ninth dangerous goods transport vehicle to transport the battery to ensure the safety of the battery.
In the warehousing phase, the public recycling partner will also keep the battery’s high safety protection level, each battery pack is equipped with separate security storage cabinets. The storage cabinet has achieved six seals, and the independent smoke is, Real-time temperature monitoring and “monitoring” of multiple measures such as sevofluoropropane fire and water spray. At the same time, each storage is equipped with at least six security officers to perform backup security protection.
The recovery of the power battery will be said. At present, internationally accepted recycling methods mainly have fire-making metallurgy and wet metallurgy. The fire metallurgy is mainly based on nickel and cobalt, and the material recovery rate is only about 50%. The public introduction, the recycling method of up to 95% -1 -100 percent recovery is wet metallurgy.
First, the Volkswagen will make unified discharge processing on the battery that cannot be used, and the saline discharge method is used in China. After the outer casing and components are disassembled, the battery system is Discliminated into a module and pulverized. 
Next, after the battery module is pulverized, the pulverized particles are dried and the moisture in the electrolyte is evaporated. The dry particles are sieved to give value “black powder”, including mixtures of lithium, nickel, manganese, cobalt and graphite. Separation is obtained by further physical screening, such as wind pick, magnetic separation, screening, baking, or the like, magnetic metal, non-magnetic metals, and plastic particles. Separated metal materials, purified by wet metallurgy, by copper extraction, cobalt nickel separation, as well as ostrich, calcification, etc. Batial-grade carbonate and other materials. These liquid materials are filtered, add precipitant, solid-liquid separation, filtration, washing, drying, and sieving iron, and final synthesis can be used to supply battery enterprises. The recovery of this battery pack is completed.
Taking the public’s German Salzgite recycling project as an example, a 400kg battery pack can be recovered from 126kg of aluminum (mainly housing), graphite 71kg (negative material material) ), Electrolyte 37kg, copper 22kg, plastic 21kg, manganese 12 kg, cobalt 9 kg, lithium 8kg, steel 3kg, nickel 1kg, and other electronic components or auxiliary materials, are equally recovered. The difference between 95 percentages and 100 percentages in China and foreign countries is mainly separated.Membrane material level. This organic fiber material is easily decomposed and destroyed during the recovery process.
At present, the power battery recycling enterprises with national recognition qualification have increased from the original five, and the public has established exclusive cooperation with many of them. . Despite the true ID. Series products have just paved the market, but this “military and horses do not work first”, the unloaded silk is prepared, worthy of the reference and reference of the entire industry. 
Industry prediction data shows that the amount of movement of the 20020 power storage battery is 24.6GWh, 33.95 gWh in 2021, 55.38GWH in 2022, and reached 134.49 GWH in 2025. That is, from this year, the retired power battery will usher in the outbreak period. In addition, the relevant report of the international market research institutions showed that the 2025 global power storage battery recycling industry will reach $ 12.2 billion, reaching $ 18.1 billion in 2030, about RMB 126.3 billion. China as the world’s most important new energy vehicle market, the annual industrial scale of retired batteries will also be expanded year by year.
New energy car is a big game, its value chain is not only sales Maintenance link, open the recycling and reuse, is undoubtedly a new value-added field, which will become an important skill of the company. 