Shin-kobe Electric Machinery Co., Ltd.

Hitachi Chemical Company, Ltd.

Yasuhiro Kobayashi

Masahiro Watanabe

Keiko Abe

Yoshikazu Hirose

Hisaaki Takabayashi

Shinichi Sano

Toshiyuki Furukawa

Ichiro Shimoura

An accumulator and state of charge evaluation method for preparing, during charging and discharging, models for each of deterioration degrees, each representing a relationship between terminal voltage, current and state of charge, for selecting respective models for the times during charging and discharging in accordance with a total charging/discharging amount (Ah), a deterioration degree or an elapsed time of an operation of the accumulator, for further estimating state of charge from current accumulation, and for determining a final state of charge from estimated states of charge including a present state of charge estimated from the models for the times during charging and discharging of the accumulator, while using a time or a total charging/discharging amount (Ah) from a time of full-charging by equal charging of the accumulator up to present time to determine the final state of charge from the plurality of states of charge.

Accumulator device, and state of charge evaluation apparatus and method for accumulator

While a control method is established which can maximize the lifetime of an storage battery based on a SOC capable of maximizing the lifetime of the storage battery under a temperature condition and a wind condition at an electricity generation site and on currently known ones of other operational conditions, a control system is constructed which can feedback to an actual wind power generation and storage battery system. The control system includes a wind power generation and storage battery system, an storage battery operation and deterioration data collection unit for collecting data of the wind power generation and storage battery system, an storage battery operation and deterioration relation assessment unit for assessing a relation between an operation of the storage battery and deterioration thereof based on the collected data, an storage battery operation planning unit for planning such a method of operating the storage battery as to satisfy a necessary lifetime requirement using information obtained by the storage battery operation and deterioration relation assessment unit, and an storage battery operation instruction unit for instructing the wind power generation and storage battery system to operate the storage battery in accordance with the plan of the storage battery operation planning unit.

System for control of wind power generation storage battery and method of control thereof

The life of a lead acid storage battery is extended by changing an over-frequency equalized charge interval performed on a lead acid storage battery, in accordance with a transition situation of a state of charge (SOC) of the lead acid storage battery. The lead acid storage battery is also made to be advantageous in terms of cost by reducing the equalized charge with a low degree of urgency to reduce the power and cost for equalized charge, and by reducing the number of stops of a natural energy storage system. A lead acid storage battery and a lead acid storage battery system whose operational management can be easily performed are achieved by a method in which the future timing when the equalized charge is performed can be grasped by people operating the lead acid storage battery.

Lead acid storage battery and lead acid storage battery system for natural energy utilization system

Growing community of inventors

Hitachinaka, Japan

Yasuhiro Kobayashi