Toyota Jidosha Kabushiki Kaisha

Ken Yoshida

Hiroshi Sato

Koji Murakami

Reina Yamada

Koji Ito

Kenji Kataoka

Kazuhiko Sakakibara

Shin Okumura

A battery discharge controller configured to control a hybrid system having first and second batteries includes a charged electric charge amount calculating section and a discharge controlling section. The discharge controlling section controls the DC/DC converter such that the first battery and the second battery are both discharged when a first reserve electric charge amount, which is a value obtained by subtracting a predetermined first lower limit electric charge amount from the charged electric charge amount of the first battery, has a positive value, a second reserve electric charge amount, which is a value obtained by subtracting a predetermined second lower limit electric charge amount from the charged electric charge amount of the second battery, has a positive value, and an absolute value of a difference between the first reserve electric charge amount and the second reserve electric charge amount is less than a predetermined threshold.

Battery discharge controller

A vehicle power supply device includes a relay controller. When a low voltage switching request is made to set a mode for supplying electric power from a switching module group to a low voltage power supply, the relay controller is configured to perform in sequence a first process of switching a first main relay and a second main relay to an open state, a second process of connecting a first switching relay to a second electrode terminal of the low voltage power supply and switching a second switching relay to a closed state, a third process of switching a precharge relay to a closed state and switching a third switching relay to a closed state, a fourth process of switching the second main relay to a closed state, and a fifth process of switching the precharge relay to an open state.

Vehicle power supply device and method for controlling vehicle power supply device

A vehicle charge control device includes a charge unit and a correction unit. The charge unit is configured to perform a charge operation for suppressing a deterioration in a battery by charging the battery until a charge end phase in which an acceptance current of the battery is smaller than a predetermined current value, the battery being mounted on a vehicle. The correction unit is configured to correct a charge rate of the battery based on a behavior of the acceptance current. In addition, the correction unit is configured to correct the charge rate based on the behavior in the charge end phase, in synchronization with the charge operation.

Vehicle charge control device to correct a state of charge

A charging control device that executes charge control appropriately without reducing effects of charge control, and is configured to include a charged state calculation unit configured to calculate remaining capacity of battery that can be charged and discharged, based on signal from a sensor to detect state of the battery; an accumulated charge and discharge calculation unit configured to calculate an accumulated amount of charge and discharge of the battery after activation of the battery, based on the signal from the sensor; an execution determination unit configured, in a case where remaining capacity calculated by charged state calculation unit is less than first threshold, to determine whether to execute charge control to recover remaining capacity of the battery, based on accumulated amount calculated by accumulated charge and discharge calculation unit; and charge control unit configured to execute charge control following determination result by execution determination unit.

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Nisshin, Japan

Ken Yoshida