Subaru Corporation

Kunihiko Kuronuma

Tomoki Shinozaki

Takuya Takashima

A sensor diagnostic device for use in a vehicle including a first temperature sensor and a second temperature sensor includes a control system. The control system includes a processor and a memory communicably coupled to each other. The control system determines a sensor abnormality based on a detected temperature difference between a first detected temperature detected by the first temperature sensor and a second detected temperature detected by the second temperature sensor. After the vehicle is stopped, the control system calculates a decrease speed of the first detected temperature based on the first detected temperature, and calculate a decrease speed of the second detected temperature based on the second detected temperature, and if an absolute value of a decrease speed difference between the first and second detected temperatures is smaller than a threshold, determines whether the sensor abnormality has occurred, based on the detected temperature difference.

Sensor diagnostic device

An electric vehicle includes an electric motor, an inverter, a battery, a first switch, an electric power converter circuit, and a second switch. The inverter is configured to drive the electric motor. The battery is configured to supply electric power to the inverter. The first switch is normally open, and configured to open and close an electric power line provided between the battery and the inverter. The second switch is normally closed, and coupled between an electric power line of the electric motor and the electric power converter circuit. The electric power converter circuit is configured to, in a case where the electric power converter circuit receives a back electromotive voltage from the electric motor via the second switch, generate a voltage that drives the first switch to be in a close state, on the basis of the back electromotive voltage.

Electric vehicle

A vehicle battery cooling system includes a battery temperature sensor, a vehicle cabin temperature sensor, a discharge path via which a vehicle cabin, a battery chamber, and outside of a vehicle communicate with each other, a circulation path that circulates air between the vehicle cabin and the battery chamber, a switching unit that switches between the discharge path and the circulation path, and a controller. When a pressurization condition is satisfied, the controller operates the switching unit to select one of the discharge path and the circulation path based on measurement results of the battery temperature sensor and the vehicle cabin temperature sensor. The pressurization condition includes a condition that an air pressure in the vehicle cabin is higher than atmospheric pressure. When temperature of a battery is in a low cooling range and is higher than temperature in the vehicle cabin, the controller selects the discharge path.

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Tokyo, Japan

Kunihiko Kuronuma