Brief description of the terraced use of power cells

"Batteries before 2012 are basically not working. "Batteries until 2014 are basically unusable. "Batteries until 2015 are basically unusable. "

With regard to the use of power cells for electric vehicles, professionals are always troubled. Old batteries are not easy to use. The difference in the judgment of the year is only the degree of severity of the battery quality. Green-minded people are also a headache, and power batteries, whether made in 2012, 2014 or 2015, have been or will be retired.

From the beginning of use, the capacity of the power cell will continue to decay. Batteries decay below 80 % of their initial state, making it difficult to power a car. At this time, the battery still has a lifetime and can be used in some scenarios where battery requirements are relatively low. This is the principle of ladder utilization. The industry is enthusiastic about the use of cascades. It is mainly based on two points: First, reducing the cost of lithium batteries, and second, protecting the environment and finding a place for old batteries.

But neither will be easy to achieve. According to the current technology and technology, the realization of power battery echelon utilization requires the completion of multiple steps such as dismantling, testing, screening, and restructuring, and the cost is high. Many companies have tried this and the cost is very high. If the waste battery is not purchased or the price is extremely low, the echelon utilization has a certain degree of economy, otherwise the cost of the echelon utilization and the cost of the new battery are not different. However, even if there is a certain degree of economy, the quality of terraced battery utilization is not optimistic. Battery technology continues to improve, and the difference in quality between old and new batteries between three and five years ago has widened. This makes terraced use of batteries less cost-effective.

The use of terraces for old batteries is temporary. If the echelon is economical, the power cell can be used for several more years, and material recovery and harmless treatment can be done later. If there is no economy, companies use new batteries more favorable, the problem of the old battery will immediately be in front of the problem. Industry industry, at the current level of the process, there is no good recycling solution. In other words, recycling is not economical.

A slightly comforting fact is that terraces use the communication base station to find suitable application scenarios. Communication base stations generally need to be equipped with backup power to ensure continuous and stable operation during power outages. The backup power supply is generally small in capacity, the difficulty of reassembling old batteries is small, and the cycle life requirement is not high. The old battery can be achieved. The cost of old batteries is lower than that of new batteries, which helps the company to reduce costs. In the communication base station standby power supply, the problem of cost effectiveness is solved.

In January 2018, China Railway Tower Co., Ltd. signed cooperation agreements with 16 companies such as BYD, Wotema New Energy, Guo Xuan Gao Ke, and Thornton New Energy. After more than two years of pilot research in the early stage, Tower Company began to large-scale use of batteries for communication base stations. The tower company has 1.8 million telecommunications base stations across the country and has the potential to help China consume large-scale decommissioned power batteries.

However, outside the Tower Company, other companies that are interested in trying are still plagued by economic problems. Regardless of whether the ladder use is feasible, the final innocuous treatment must be faced.

One line of thought to address this issue is the establishment of extended producer responsibility systems. Whoever produces is responsible for it. In some European countries, the price of daily dry batteries is much higher than in China, because companies have the obligation to handle old batteries and they will transfer the treatment costs to consumers. In electric vehicles, Chinese government authorities are building such a system. If recycling is still not economical in the future, electric cars may raise prices.

Whether the government or consumers are looking for electric cars to reduce prices, if it really comes to an environmental price rise, people are willing to accept it?

The page contains the contents of the machine translation.