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:
May. 28, 2002
Filed:
Apr. 26, 2001
Takashi Kobayashi, Hirakata, JP;
Matsushita Electric Industrial Co., Ltd., Kadoma, JP;
Abstract
A secondary battery pack comprises a current detector for detecting charge current or discharge current of a secondary battery, a voltage detector for detecting voltage of the secondary battery, a temperature detector for measuring temperature of the secondary battery, a controller for calculating residual capacity of the secondary battery based on each parameter detected by each detector, and a display unit for displaying the calculated residual capacity. The display unit has at least two kinds of display states, and displays the residual capacity of the secondary battery using a ratio between respective display times of the two kinds of display states.