Gs Yuasa International Ltd.

Hiroki Matsui

Seijiro Ochiai

Takaaki Iguchi

Yuta Kashiwa

Kazuki Furukawa

The present invention comprises a voltage detection circuit for measuring the voltage of an assembled batteryin which power storage elementsare serially connected, a current detection resistor for detecting the current in the assembled battery, and a CPUfor calculating, inter alia, the amount of energization electricity from continuous charging or continuous discharging of the assembled battery. The CPUcontrols input/output for when the assembled batteryis charged/discharged so that ΔSOC, which is the value obtained by dividing the amount of energization electricity by the actual capacity of the assembled battery, does not exceed an upper limit ΔSOC.

Management apparatus for energy storage device, energy storage apparatus, and input/output control method for energy storage device

A deterioration amount estimation device includes a calculation unit (CPU) that calculates a deterioration amount of an energy storage device and an estimation unit (CPU) that estimates a transient deterioration amount based on a deterioration amount calculated by the calculation unit and a continuous deterioration amount that does not decrease with time and continues. The transient deterioration amount is estimated, and the input/output of the energy storage device is limited to suppress an increase in the continuous deterioration amount.

Deterioration amount estimation device, energy storage system, deterioration amount estimation method, and computer program

A charge voltage controller for a chargeable and dischargeable energy storage device including an electrode assembly having a positive electrode and a negative electrode, is configured to control upper limit voltage applied to charge the energy storage device in accordance with at least one of charge time of the energy storage device, current inputted to the energy storage device, temperature of the energy storage device, and a state of charge of the energy storage device, to inhibit potential of the negative electrode from being lower than deposition potential at which metal ions transmitting and receiving an electric charge between the positive electrode and the negative electrode are deposited at the negative electrode. The deposition potential is variable in accordance with a state of charge of the energy storage device, and/or charge time of the energy storage device, and/or current inputted to the energy storage device, and/or temperature of the energy storage device.

Charge voltage controller for energy storage device, energy storage apparatus, battery charger for energy storage device, and charging method for energy storage device

An embodiment provides a charge voltage controller for a chargeable and dischargeable energy storage device including an electrode assembly having a positive electrode and a negative electrode, the charge voltage controller configured to control upper limit voltage applied to charge the energy storage device in accordance with at least one of charge time of the energy storage device, current inputted to the energy storage device, temperature of the energy storage device, and a state of charge of the energy storage device, to inhibit potential of the negative electrode from being lower than deposition potential at which metal ions transmitting and receiving an electric charge between the positive electrode and the negative electrode are deposited at the negative electrode.

It is an object of an embodiment to provide a degradation estimator for an energy storage device, configured to estimate degradation of the energy storage device, an energy storage apparatus, an input-output control device for the energy storage device, and a method for controlling input and output of the energy storage device. The embodiment includes estimating a temporary power decrease rate of the energy storage device in accordance with at least one of an average load, a maximum load, and a &#x394;SOC obtained from detected current of the energy storage device and detected temperature of the energy storage device.

Degradation estimator for energy storage device, energy storage apparatus, input-output control device for energy storage device, and method for controlling input and output of energy storage device

Growing community of inventors

Kyoto, Japan

Hiroki Matsui