哲郎 重水

TL;DR: In this article, a power storage device is equipped with a power conversion mechanism which performs the charge and discharge of an accumulator on the basis of the converter power command given from a controller.

TL;DR: In this article, the authors proposed a solution to provide an electric energy storage system with life elongated by providing a main battery unit 2 equipped with a plurality of secondary batteries, and a buffer battery unit 3 capable of supplying power from, as well as to, the main battery units.

TL;DR: In this paper, a cell balance circuit 3 starts to conduct cell balance control, a system controller 30 opens a switching device corresponding to an arm conducting the cell balance operation, and when the balance control is finished and the difference between the inter-terminal voltage of an arm battery pack subjected to the cell balancing control and the interterminal voltages of the other arm battery packs comes within a predetermined allowable range, the system controller closes the opened switching device.

TL;DR: In this paper, the authors proposed a technique for controlling a current flowing into each serial cell group at low cost, while securing system reliability, concerning a battery pack which employs a parallel structure of serial cell groups.

TL;DR: In this paper, a voltage equalization device for an electric power storage device 300 including battery rows 20 in which multiple secondary batteries are connected, power converters 30 provided in correspondence with the battery row 20; and control devices 40 for controlling the power converter 30.