Gs Yuasa International Ltd.

Tomohiro Kawauchi

Takeyuki Shiraishi

Takeshi Nakamoto

Takeshi Itagaki

Yoshihiko Mizuta

Masayuki Imura

Yasutaka Miyawaki

Toshiki Kusunoki

Daisuke Konishi

Tomoshige Inoue

Masashi Nakamura

Tsuyoshi Hidaka

Battery

The present invention reduces the effort involved in an operation for cancelling a current cutoff device while inhibiting a capacity decline during parking. Provided is a battery devicethat is to be mounted on a vehicle, and that is provided with: an assembled batterythat supplies electric power to loadsincluding an engine starting deviceA; a current cutoff devicethat cuts off an electric current to the loadsfrom the assembled battery; and a control unit, wherein upon detecting a parked state of the vehicle, the control unitoperates the current breaker deviceso as to execute a current cutoff process for cutting off the current flowing from the assembled batteryto the loads, and following the execution of the current cutoff process, if a prior action to be performed on the vehicle by a user before starting driving is detected, the control unitcancels the cutoff of current by cancelling the operation of the current breaker device

Battery apparatus, vehicle, and automatic vehicle

A power supply protective device, includes: a first switch provided between a first terminal to which at least one of a load and a charger is connected and a second terminal to which a power supply is connected; a switching circuit connected in parallel to the first switch and including a second switch and a voltage drop element connected in series to the second switch, the voltage drop element causing a voltage drop of a reference voltage by a current flow; a voltage detection unit which detects at least one voltage of a first voltage as a voltage of the first terminal, a second voltage as a voltage of the second terminal, and a third voltage as a voltage at a point between the second switch and the voltage drop element; and a control unit.

Power supply protective device, power supply device and switch failure diagnosing method

A power supply protective device, when obtaining an open voltage when a second switch is brought into a closed state and a first switch is brought into an open state during discharging of a power supply, and obtaining a close voltage when the second switch is brought into the closed state and the first switch is brought into the closed state during discharging of the power supply, diagnoses the first switch as having a failure or not on the basis of the open voltage and the close voltage. When executing first a close instruction to the first switch and the second switch, if a voltage difference is less than a first threshold voltage, the first switch is determined to have no open failure, and/or when not less than a second threshold voltage, the second switch is determined to have no open failure.

A monitoring device for a secondary battery includes: a detection part that detects a use state of the secondary battery; and a switching part, wherein the switching part switches a protection condition applied to the secondary battery in accordance with the user state of the secondary battery.

Monitoring device for secondary battery, battery pack, and vehicle

A switch failure diagnosis device for using in a current path between an electric device and an electric storage device includes plural switches, a switch terminal voltage detector, and a controller. The switches are connected parallel to each other in the current path. The switch terminal voltage detector outputs a switch terminal voltage detection signal. The controller is configured to select the switches at different time in sequence and input an open instruction signal to each switch at the time when the switch is selected, and to determine, based on the switch terminal voltage detection signal output while the open instruction signal is given, that at least one of the switches has a failure if the detected voltage is in a failure determination range.

Switch failure diagnosis device and electric storage apparatus

A switch failure diagnosis device for using in a current path between an electric device and an electric storage device includes plural switches, a switch terminal voltage detector, and a controller. The switches are connected parallel to each other in the current path. The switch terminal voltage detector outputs a switch terminal voltage detection signal. The controller is configured to: select the switches at different time in sequence and input an open instruction signal to each switch at the time when the switch is selected; and determine, based on the switch terminal voltage detection signal output while the open instruction signal is given, that at least one of the switches has a failure if the detected voltage is in a failure determination range.

Growing community of inventors

Kyoto, Japan

Tomohiro Kawauchi