Panasonic Intellectual Property Management Co., Ltd.

Sanyo Electric Co., Ltd.

Panasonic Holdings Corporation

Chikara Ohmori

Naohisa Morimoto

Kenji Koizumi

Shinya Nakano

Yoshitaka Ishikawa

A circuit device that is connected to a temperature detection element that detects a temperature of an object via an external signal line and an external signal ground line includes a connector that is connected to the external signal line and the external signal ground line, an internal signal line that is connected to the external signal line via the connector, an internal signal ground line that is connected to the external signal ground line via the connector, a controlling circuit that is connected to the internal signal line and the internal signal ground line and detects the temperature of the object, and a high-frequency filter that is inserted into at least one of a foremost stage of the internal signal line and a foremost stage of the internal signal ground line as viewed from the connector.

Circuit device and temperature detection system

A power storage unit is configured with a plurality of cell strings (St, St, St), where the cell strings are parallel-connected, and each cell string (St, St, St) is constituted by a plurality of series-connected cells (Eto E, Eto E, Eto E). Voltage detector (to) detects a voltage of each of the plurality of cell strings (St, St, St). A plurality of switches (S, S, S) are respectively inserted in the plurality of cell strings (St, St, St). Management unit () performs, in a non-running state of vehicle () that power supply system () is mounted on, an equalization process to equalize a voltage and/or capacity between the plurality of cell strings (St, St, St) by turning on at least two of the plurality of switches (S, S, S).

Vehicular power supply system, and management device

An equalization circuit includes: discharge sections which are provided correspondingly to secondary batteries respectively, and discharge the corresponding secondary batteries to convert energy resulting from the discharge into heat; a temperature detector which detects a temperature under the converted heat; and an equalization controller which selects a discharge section as a selection discharge section, the selection discharge section corresponding to a secondary battery of the secondary batteries to be discharged, the equalization controller causing the selection discharge section to discharge the corresponding secondary battery, and equalizing electric quantities accumulated in the secondary batteries, wherein if the secondary battery is discharged by the selection discharge section and if the temperature detected by the temperature detector is higher than a predetermined reference temperature, the equalization controller reduces a discharge current to a value lower than a value when the temperature is lower than the reference temperature.

Growing community of inventors

Osaka, Japan

Chikara Ohmori