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:
Feb. 11, 2025
Filed:
Dec. 26, 2019
Tmeic Corporation, Chuo-ku, JP;
Hidenobu Tajima, Chuo-ku, JP;
TMEIC Corporation, Chuo-ku, JP;
Abstract
A power supply device includes an inverter, a voltage converter, a capacitor, a current detector, a counter, and a controller. The inverter converts DC power into AC power and supplies the converted AC power to a load. The voltage converter performs voltage conversion for a DC voltage from a battery. The capacitor smoothes the DC voltage from the voltage converter and inputs the smoothed DC voltage to the inverter. The current detector detects a battery current flowing from the battery into the voltage converter. The counter measures a discharge time of the battery. The controller stops the voltage converter when the measured discharge time of the battery exceeds a discharge permissible time. Based on an output from the current detector, the controller sets the discharge permissible time to be shorter as the battery current is higher when the battery current exceeds a threshold value during discharging of the battery.