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:
Sep. 29, 2009
Filed:
Aug. 21, 2006
James K. Klang, Wheaton, IL (US);
James K. Klang, Wheaton, IL (US);
Midtronics, Inc., Willowbrook, IL (US);
Abstract
A method and apparatus for simulating a battery tester with a fixed resistance load, such as a widely used Japanese load tester that rates the strength of Japanese batteries that are categorized under the Japanese Industrial Standard (JIS), are provided. This invention simulates such a device without invoking large current loads, yields familiar results, utilizes an existing database and provides more conclusive testing. The method includes estimating a battery load test voltage as a function of a measured battery dynamic parameter, an open circuit voltage, the load resistance value of the load tester and the battery temperature. A bounceback voltage (BBV) of the battery is also predicted. The BBV, load voltage and battery temperature are utilized to rate the strength of the battery. Also, to improve the accuracy of test results for a substantially discharged battery, one embodiment projects the results of recharging discharged batteries without actually doing so.