Denso Corporation

Akira Sumi

Masakazu Kouda

Yusuke Shindo

Toru Wakimoto

Akihiko Ito

Yasuhito Tanabe

Tomohiro Takizawa

Ryota Kubokawa

Toshiki Kojima

Dachao Wang

A vehicular power supply system includes a sensor unit that detects a battery state of a storage battery and a control unit that performs instruction to perform energization and interruption thereof between the storage battery and the electrical load based on the battery state. The sensor unit includes a detection unit that detects the battery state of the storage battery, a switch drive unit that performs drive control of a switch unit provided between the storage battery and the electrical load, and a control unit that controls the switch drive unit. The control unit switches between the energization and interruption thereof between the storage battery and the electrical load. If determining an abnormality, the control unit determines whether to maintain the energization between the storage battery and the electrical load based on the battery state and switches between the energization and interruption thereof based on the determination.

Vehicular power supply system

An electronic control apparatus includes a first controller that is activated upon being fed with electric power through a first electric power feeding path, and a second controller that is fed with electric power through a second electric power feeding path. In the first electric power feeding path, there is provided a power supply switch that is turned on when a switch command is a connection command and turned off when the switch command is a cutoff command. The first controller transmits a state signal indicating whether it is in an activated state or a stopped state. The second controller diagnoses the power supply switch as being abnormal on condition that the state signal indicates the stopped state of the first controller when the switch command is the connection command or the state signal indicates the activated state of the first controller when the switch command is the cutoff command.

Electronic control apparatus

In an insulation resistance detection apparatus, a voltage determiner determines whether a detection voltage, which has changed by at least a preset value, becomes stable at around a changed voltage value. A resistance determiner determines a value of an insulation resistance between a ground portion and a power-supply path based on a currently sampled value of the detection voltage instead of a moving average in response to determination that the detection voltage, which has changed by at least the preset value, becomes stable at around the changed voltage value.

Insulation resistance determination apparatus

A battery system includes a plurality of battery modules and a control apparatus. The battery includes a battery group that includes two or more battery modules including battery units and battery monitoring units. The battery monitoring units of the battery modules being connected to each other via a communication line. The battery modules perform wired communication via the communication line. The battery group further includes a wireless receiving unit and a wireless transmitting unit. The wireless receiving unit wirelessly receives a command signal transmitted from the control apparatus. The wireless transmitting unit wirelessly transmits, to the control apparatus, a data signal including module identification information differing for each battery module. In the battery group, the wireless receiving unit is provided in a single battery module of the battery modules and the wireless transmitting unit is provided in a single battery module of the battery modules.

Growing community of inventors

Kariya, Japan

Akira Sumi