A demand has emerged for technologies that enable the efficient reuse and recycling of the used batteries that will accrue as electric vehicles come into regular use. We are therefore developing a control function (SWEEP SYSTEM®) that allows multiple used batteries to be connected together so that they can be reused as a single high-capacity battery. At the same time, this function serves to charge and discharge these batteries efficiently despite differences in the degree of deterioration and performance of each component battery. By conducting demonstrations in collaboration with the electric power industry, we are also exploring the possibility of using these batteries in power buffers for introducing renewable energy.
High-capacity battery consisting of multiple used batteries connected together (SWEEP SYSTEM®)