Why are power lithium-ion batteries used in cascades?

Just recycle the battery and dispose of it. Why use it in cascade? There are three reasons: First, the cost of lithium batteries occupies a relatively high proportion of the cost of new energy vehicles. The high cost of lithium batteries is an important factor restricting the development of new energy vehicles. The normal service life of lithium batteries may only be three to five years. Through cascade utilization, the life of lithium batteries can be prolonged and the cost can be reduced. Second, if the lithium battery that has reached the end of its life is directly eliminated, it will cause a lot of waste. For example, in 2014, the sales volume of new energy vehicles was 70,000. In the next five years, at this rate, the number of new energy vehicles will exceed 400,000 by 2020. If the average single car is equipped with a 20kWh power lithium-ion battery, after the attenuation, the average capacity of each car is still 15KWh, even if only half of it is recycled, it is equivalent to recycling a 3000MWh battery. If these batteries are in the trash can, it is really a great waste. The average battery capacity of lithium-ion batteries for general electric vehicles is still 15KWh after attenuation. Third, as for the energy storage market, cost is also a key factor restricting the commercial development of the industry. Therefore, there is a discussion about low-cost energy storage methods. The demand is also very urgent. If low-cost battery solutions can be obtained through echelon utilization, it is also very beneficial to the development of the energy storage industry. The feasibility of battery cascade utilization has been demonstrated more than once. First of all, power lithium-ion batteries are used in groups, and the entire group of batteries may be unusable due to the failure of several batteries. This means that in this battery pack, there are still some batteries whose performance is normal. Secondly, many organizations have done a lot of data tests on recycled batteries and found that many decommissioned power lithium-ion batteries still have acceptable performance regardless of capacity, performance and cycle life. All of this provides solid evidence for the technical feasibility of the echelon utilization of power lithium-ion batteries. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous article: What are the precautions during battery charging and repair?