In the era of green environmental protection, new energy vehicles have entered a period of rapid development. In 2015, Chinaâ€™s cumulative production of new energy vehicles totaled 379,000 units, a four-fold increase year-on-year.
With the explosive growth of new energy vehicles, there will undoubtedly be a large number of decommissioned power batteries after 4-5 years. Accompanied by this, the use of power battery cascades for electric vehicles has also become an industry hot spot.
Larger use of power battery cascades
The reporter learned from the China Chemical and Physical Power Industry Association that, in 2015, domestic power battery production was about 16 GWh, and it is expected to reach 32 GWh by the end of 2016.
According to the forecast of China Automotive Technology and Research Center, by 2020, the cumulative scrap quantity of electric vehicles for electric vehicles in China will reach a scale of 120,000 to 170,000 tons. If these decommissioned batteries are directly used for resource recovery, it will inevitably cause waste. The most effective way to maximize this function is to use cascades and then reuse them as resources.
As Yang Yusheng, an academician of the Chinese Academy of Engineering, said: â€œThese scrapped power batteries have advanced manufacturing technology. Even if they are still scrapped and still maintain high safety and electrical performance, it is necessary to use cascaded methods to maximize the utilization of waste power batteries. â€
It is understood that at present, there are many cases in which waste power batteries have been applied to the field of energy storage after detection and reorganization. Prior to this, Prof. Lu Lu, a doctoral supervisor at Peking University's New Energy Materials and Technology Laboratory, told reporters that hundreds of electric buses put into operation in the 2008 Olympic Games will be used for wind power and photovoltaic energy storage after 3 years of operation.
In the interview, many people believed that taking into account the strong development trend of electric vehicles in the future, it will also bring blue oceans for the use of power battery cascades.
Battery Recycling Still Has Technical Obstacles
The power battery has reached the service life according to the national standard. When it is removed from a new energy vehicle, there is considerable capacity and a relatively wide use space. The use of decommissioned power batteries in the field of energy storage is a good choice both in terms of economy and environmental protection.
However, decommissioned batteries are not as combinable as they are supposed to be, and there are technical barriers. When using cascades, the battery consistency is very different from that of the new battery, which causes great obstacles to the use of the battery. At the same time, when the battery capacity, voltage, and internal resistance are used on a cascade, it will form a cliff-type decline with a small number of cycles, which will cause great difficulties for later use.
In order to promote the cascade utilization of power batteries, in addition to encouragement and support at the national policy level, many local governments are also actively exploring.
Such as the introduction of Shanghai's policy, car companies to recover power battery government will subsidize 1,000 yuan / set; Shenzhen to establish a power battery utilization and recycling system, each selling a car maker took out 600 yuan, the government took out 300 yuan for the recovery of power batteries Initially establish the mechanism for battery recycling.
It is reported that, at present, including the State Grid, local governments, battery companies, etc. have carried out research on power battery cascade recovery. For example, the State Grid Henan Power Company built a microgrid system in 2013 and created a set of standardized processes for power battery sorting, evaluation, and matching. According to public information, the project is located at the Jianshan True Type Transmission Line Test Base in Zhengzhou City and is the first truly hybrid power grid-based hybrid microgrid system in China. The current system is in good condition.
â€œRecycling batteries for recycling can be used in smaller family car batteries, UPS (Uninterruptible Power Systems), etc.â€ Chen Yongji, head of the energy storage technology research group of the Institute of Electrical Engineering of the Chinese Academy of Sciences, confessed that â€œbut for large-scale energy storage power stations, we have to consider Cyclicality, safety, there will be non-linear changes, the probability of accidents will increase, while the management costs will also increase.However, the use of power battery is not a fundamental solution to the ladder, we also need to actively develop easy recovery New environmentally friendly power battery."
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