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:
Mar. 16, 1999
Filed:
Sep. 05, 1997
Applicant:
Inventors:
Johann R Van Beek, Eindhoven, NL;
Eduard E Gillissen, Heerlen, NL;
Assignee:
U.S. Philips Corporation, NY, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02J / ;
U.S. Cl.
CPC ...
320136 ; 320118 ; 324433 ;
Abstract
A battery-powered electrical device with a rechargeable battery pack and a means for preventing excessive discharge of the cells in the battery pack. Each cell is characterized by a voltage-value V.sub.end at which it is desirable to terminate discharge of the cell. The cells are divided into a number of mutually exclusive subsets s.sub.i having N.sub.i cells. The device comprises means for measuring the series voltage V.sub.i across each subset s.sub.i, and interrupting the current to the device if the condition V.sub.i .ltoreq.n.sub.i .times.V.sub.end is met in any of the subsets s.sub.i.