Hitachi Chemical Company, Ltd.

Shin-kobe Electric Machinery Co., Ltd.

Ichiro Mukaitani

Yasuhiro Shibata

Mitsuyoshi Kanoh

Shinya Mizusugi

Takashi Kofuse

Yoshiaki Itoh

Takeo Sakamoto

In a state monitoring of a storage battery, accuracy of estimation of the remaining service life of the storage battery can be improved by monitoring the state of the storage battery and distinguishing an initial failure and an accidental failure from degradation over time. A storage battery state monitoring system which monitors a state of each of a plurality of storage batteries connected in series and constituting an assembled battery provided in an apparatus, the system includes a control/power supply device which detects a current in each of the storage batteries, and a slave device which measures an operation time, a temperature, a voltage, and an internal resistance of each of the storage batteries, the internal resistance being measured at at least two or more kinds of frequencies, and in a state that is not normal in each of the storage batteries is determined by distinguishing an initial failure or an accidental failure from degradation over time based on at least one or more values of the temperature, the voltage, and the internal resistance measured by the slave device and a direct current resistance of each of the storage batteries obtained from a ratio between a change in a current value detected by the control/power supply device and a change in a voltage value measured by the slave device during discharging of each of the storage batteries.

Storage battery state monitoring system, storage battery state monitoring method, and storage battery state monitoring program

A battery-state monitoring system capable of efficiently estimating the state and service life of each storage battery at high precision by automatically measuring or acquiring various parameters of a plurality of storage batteries constantly connected to an equipment is provided. The system monitors a state of each of a plurality of batteries connected in series and constituting an assembled battery incorporated in an equipment includes a power supply control device that detects a current flowing through each battery; and an end device that measures a temperature, a voltage, and internal resistance of each battery, the internal resistance being measured by using at least two or more kinds of frequencies, and degradation of each battery is estimated based on one or more temperature, voltage, and internal resistance.

Battery-state monitoring system

A battery-state monitoring system capable of precisely and efficiently estimating the state and service life of a plurality of storage batteries charged with power generated by utilizing natural energy and constantly connected to an equipment is provided. The system includes a power supply control device that detects a current in each battery, an end device that measures temperature, voltage, and internal resistance of each battery, the internal resistance being measured by using two or more kinds of frequencies, and a prime monitoring device that acquires measurement data from the end device corresponding to each battery and issues an instruction related to an operation to the power supply control device and the end device. The prime monitoring device estimates degradation of each battery based on at least one of temperature, voltage, and internal resistance.

A battery-state monitoring system for precisely and efficiently estimating the state and service life of each of a plurality of storage batteries while suppressing variations in voltage between the batteries in a large-scale power-supply system that is provided with the storage batteries charged with power generated by utilizing natural energy is provided. The system includes a power supply control device that detects a current in each storage battery, an end device that measures temperature, voltage, and internal resistance of each battery, the internal resistance being measured by using at least two or more kinds of frequencies, and a prime monitoring device that acquires measurement data from the end device corresponding to each battery and issues an instruction related to an operation to the power supply control device and the end device. The prime monitoring device estimates degradation of each battery based on one or more of temperature, voltage, internal resistance.

Growing community of inventors

Tokyo, Japan

Ichiro Mukaitani