Gs Yuasa International Ltd.

Seiji Takai

Yuki Imanaka

Masayuki Imura

Eiji Hayashi

Yu Matsumoto

Masaki Oya

Shinichi Namitoko

A computer is caused to execute a process of; executing, for a system including an energy storage device and a powered unit driven by power supplied from the energy storage device wherein the energy storage device including a switch for switching between energized and non-energized states and having a switch self-diagnosis function, a simulation regarding switch self-diagnosis using a battery model for simulating the energy storage device and a powered-unit model for simulating the powered unit; and determining compatibility between the energy storage device and the powered unit based on an execution result of the simulation.

Computer program, determination device, and determination method

A battery management device manages an energy storage device to which a shunt resistor is connected. The battery management device includes: a current measurement unit that measures a current flowing through the shunt resistor using a pair of signal wires connected to both ends of the shunt resistor; a connecting wire that connects the signal wire to a reference potential source via an opening/closing switch; and a determination unit that determines presence or absence of a failure in which connection between the pair of signal wires via the shunt resistor becomes defective based on a change in current measured by the current measurement unit when the opening/closing switch is opened and closed.

Battery management device, energy storage apparatus, battery management method, and computer program

A measurement deviceof an electrochemical elementthat is connected, via a first switch, to a terminal partP having a load connected thereto, wherein: the measurement deviceis provided with a current limitation unitprovided to a bypass path BP of the first switch, a current sensorfor measuring the current of the electrochemical element, and a processing unit; when a voltage difference &#x394;V between the voltage of the electrochemical elementand the voltage of the terminal partP is equal to or greater than a prescribed value, the current limitation unitpermits the supply of power to the load through the bypass path BP, and when the voltage difference &#x394;V is less than the prescribed value, the current limitation unitcuts off the current to the bypass path BP; and in a period of time after the first switchhas been turned off and until the voltage difference &#x394;V reaches the prescribed value due to a change in voltage of the terminal partP because of discharging of a charge/discharge elementconnected in parallel to the load, the processing unitperforms a measurement process to measure the offset error &#x3b5; of the current sensor

Growing community of inventors

Kyoto, Japan

Seiji Takai