Sumitomo Electric Industries, Limited

The Kansai Electric Power Co., Inc.

Yasumitsu Tsutsui

Hiroyuki Nakaishi

Takahiro Kumamoto

Nobuyuki Tokuda

Katsuya Yamanishi

A redox flow battery system includes a cell that performs charging and discharging between the cell and a power system, a tank that stores an electrolyte supplied to the cell, a circulation pump that circulates the electrolyte between the cell and the tank, a power converter disposed between the cell and the power system, and a charge/discharge control unit that controls an operation of the power converter to control charging and discharging of the cell. When the charge/discharge control unit detects power failure in the power system, the charge/discharge control unit controls the power converter such that power of the electrolyte remaining in the cell is supplied to the circulation pump.

Redox flow battery system and method for operating redox flow battery system

An easy-to-assemble battery sealing structure is provided. A cell frame includes a battery plate-like member (bipolar plate), a pair of frames for holding a peripheral portion of bipolar plate therebetween and pressing the peripheral portion from the front and the rear, and an annular packing made of an elastic material. Frames are provided with an annular groove between respective surfaces of the frames facing each other, for accommodating the peripheral portion of bipolar plate. Packing is mounted on the peripheral portion of bipolar plate, arranged in annular groove, and press-contacted between frames and the peripheral portion of bipolar plate. Packing includes a pair of legs for holding the peripheral portion of bipolar plate therebetween, and a base connecting legs together.

Battery sealing structure, electrolyte circulation type battery cell frame, electrolyte circulation type battery cell stack, and electrolyte circulation type battery

The invention provides a secondary battery system that allows a high overload operation regardless of discharging condition during a steady operation, and an operating method thereof. The secondary battery system comprises first tanksfor reserving electrolytes required for a steady operation, and second tanksfor reserving electrolytes required for an emergency operation. Valvesare opened and closed for allowing selective switching between the electrolytes in the first tanksand the electrolytes in the second tanksto circulate the selected electrolytes through a cell stack. The electrolytes reserved in the second tanksare electrolytes having a proportion of a quantity of active material produced in a charging reaction to a total quantity of active material of not less than 50%.

Method of operating a secondary battery system having first and second tanks for reserving electrolytes

An electromagnetic detachable connector includes a pair of female and male connectors. Each of female and male connectors includes a movable section and a fixed section. Each movable section includes a row of terminals that can be connected with those of another movable section, and a guide that can be fitted with that of the another movable section. The fixed sections are relatively fixed so as to have respective movable sections face each other. A permanent magnet and an electromagnet are arranged at a predetermined position of the female and male connectors. Exerting an electromagnetic force on the permanent magnet so that the movable sections move in a direction so as to come closer to or farther away from each other achieves a drive control for connection and disconnection. With this structure, an electromagnetic detachable connector is provided that can control, automatically and with high precision, the connection and disconnection between the female and male connectors.

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Osaka, Japan

Yasumitsu Tsutsui