Fuji Jukogyo Kabushiki Kaisha

Toyota Jidosha Kabushiki Kaisha

Kazuhiko Matsuda

Tomokazu Masuda

Kiyohito Machida

Sumikazu Shamoto

Naoki Kanie

Tatsuo Hidaka

In response to connection of a vehicle with an external power supply, a plug ECU (PLG-ECU) performs a first charging operation of controlling a charger using a target value which is set to a state of charge lower than a predetermined full state of charge, until the state of charge of a power storage device reaches the target value. After the state of charge reaches the target value, the PLG-ECU stops charging of the power storage device, and restarts charging of the power storage device so that the state of charge reaches the predetermined full state of charge at a scheduled time to end charging which is specified through the use of an input unit.

Vehicle charging system and vehicle charging method with first and second charging operations

A remaining capacity estimating system and method for an automobile battery capable of estimating and displaying an accurate remaining battery capacity by calculating an internal resistance value of the battery based on a terminal voltage in a disconnected state to electrical loads, a terminal voltage in a selectively connected state to an electrical load and a discharge current value in this connected state, then obtaining a remaining battery capacity at the present temperature condition from a map showing a relationship among a remaining battery capacity, a discharge current and an internal resistance, and finally transforming the obtained remaining battery capacity into a remaining battery capacity at a standard temperature condition.

Battery capacity estimating system and method

Growing community of inventors

Koganei, Japan

Kazuhiko Matsuda