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:
Aug. 13, 2019
Filed:
Apr. 06, 2016
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Kiyoe Ochiai, Nagoya, JP;
Junta Izumi, Nagoya, JP;
Kiyohito Machida, Nissin, JP;
Masakazu Habu, Toyota, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota-shi, Aichi-ken, JP;
Abstract
A secondary battery is installed on an electric vehicle and includes a cooling fan, a temperature sensor and a controller. The controller is configured to drive the cooling fan at a fixed command value for a predetermined period, when the temperature of the secondary battery becomes equal to or higher than a first predetermined temperature after the electric vehicle is started. The controller is configured to detect a presence or absence of an abnormality in the cooling fan based on an actual rotational speed of the cooling fan during the predetermined period. The controller is configured to inhibit driving of the cooling fan at the fixed command value when the temperature of the secondary battery is equal to or higher than a second predetermined temperature that is higher than the first predetermined temperature.