The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 10, 2019
Filed:
Apr. 06, 2016
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Junta Izumi, Nagoya, JP;
Noritaka Ikejiri, Toyota, JP;
Kiyoe Ochiai, Nagoya, JP;
Kiyohito Machida, Nissin, JP;
Masakazu Habu, Toyota, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota-shi, Aichi-ken, JP;
Abstract
A cooling system includes a cooling fan that blows cooled air to a main battery and a temperature sensor. When the temperature of the main battery is equal to or higher than a first predetermined temperature after start up of an electric drive vehicle, the cooling fan is driven with a constant command value for a predetermined time period and detection process of abnormal condition is performed for detecting presence or absence of abnormal condition of the cooling fan based on an actual rotation speed of the cooling fan. When the start up of the electric drive vehicle is based on an external charging operation of the secondary battery, driving of the cooling fan with the constant command value is inhibited. This structure ensures sufficient opportunities for detecting presence or absence of abnormal condition of the cooling fan.