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. 17, 2019
Filed:
Feb. 25, 2019
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Yutaka Tano, Toyota, JP;
Takahiro Umehara, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Abstract
The present disclosure is made in order to reduce inaccuracy of current sensors. A fuel cell system includes a converter configured to convert output voltage of the fuel cell, and a current sensor including a preliminarily magnetized magnetic core and configured to measure current flowing in the converter from the fuel cell. A controller operates in a first driving mode in which a maximum current value in a target circuit of current measurement by the current sensor is lower than a current value for preliminary magnetization of the magnetic core, and a second driving mode in which the maximum current value in the target circuit is higher than the maximum current value in the target circuit in the first driving mode. When an accumulated temperature value of the current sensor in the first driving mode exceeds a threshold, the second driving mode is executed, followed by the first driving mode.