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:
Jul. 31, 2001
Filed:
Sep. 26, 2000
Helmut Laig-Hörstebrock, Frankfurt, DE;
Eberhard Meissner, Hofheim, DE;
VB Autobatterie GmbH, , DE;
Abstract
A method for determining the starting ability of the starter battery in a motor vehicle. The current and voltage of the storage battery are measured before starting is begun, shortly after starting is begun and at short intervals of time during the starting procedure. The current/voltage value pairs for each instant are used to calculate a resistance value and the quantity of charge drawn from the storage battery, and the rate of rise in the resistance values as a function of the quantity of charge drawn is used to derive a measure of the availability of the storage battery during the starting procedure. In particular, the gradient &Dgr;RQ of the internal resistance as a function of the quantity of charge drawn and the turn-on internal resistance R,are stored in an arithmetical memory as a field as a function of the charge state or of the equivalent no-load voltage (U,) and the battery temperature and are compared with already recorded values or typical normal values.