Toyota Jidosha Kabushiki Kaisha

Denso Corporation

Masatoshi Shinohara

Akihiko Ide

Hidetsugu Hamada

Shohei Sunahara

Keisuke Hata

Daisuke Harada

Hiroki Umeda

Shoji Tsutsui

An electric device includes a substrate on which electronic components are mounted, and a metal plate to which the substrate is fixed. The metal plate includes first bosses provided at positions corresponding to four corners of the substrate, a second boss provided inside a rectangle that connects the four first bosses, and a slit that is provided adjacent to the second boss, and extends in non-parallel with any side of the rectangle. The substrate is fixed to each of the four first bosses with a first male screw, such that a rubber washer is sandwiched between the substrate and the first male screw. The substrate is fixed to the second boss with a second male screw, such that no rubber washer is sandwiched between the substrate and the second male screw.

Electric device

An electric power conversion system includes: a first battery; a second battery; an electric power converter including a plurality of switching elements, and configured to bidirectionally step up or step down electric power between an output line and each the first and second batteries in accordance with PWM signals; and a controller configured to control first and second step-up and step-down circuits by generating first and second PWM signals. The first and second step-up and step-down circuits are established between each first and second batteries and the output line. The first and second PWM signals are signals for controlling step-up and step-down operation of each first and second step-up and step-down circuit. The controller is configured to, when coupling on-duty periods of both the first and second PWM signals with each other, execute an overlap phase shift that partially overlaps the on-duty periods of the first and second PWM signals.

Electric power conversion system

A power supply system includes: a first battery; a second battery; a voltage converter including a plurality of switching elements; and a controller configured to turn on or off the plurality of switching elements in accordance with pulse width modulation control. The controller is configured to control phases of the pulse width modulation control signals such that the first high-level period of the first pulse width modulation control signal and the second high-level period of the second pulse width modulation control signal do not overlap with each other at a predetermined condition.

Power supply system

An electric power conversion unit of an electric power converter establishes two converter circuits including four switching elements and two batteries and carries out electric power conversion in a parallel mode in which the batteries are connected in parallel with each other. A controller is configured to set a control signal for each of the switching elements, identify a target switching element of which a temperature is suppressed, determine a state having a maximum loss value in correspondence with input-output data, and execute phase control for suppressing the maximum loss value.

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Toyota, Japan

Masatoshi Shinohara