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. 24, 1992
Filed:
Nov. 19, 1990
Hermann Birnbreier, Sandhausen, DE;
Stefan Mennicke, Gauangelloch, DE;
Asea Brown Boveri Aktiengesellschaft, Manheim, DE;
Abstract
In high-temperature batteries which contain a series circuit of galvanic cells with a solid electrolyte, the solid electrolyte can be damaged without the damage being noticed when the battery is short circuited in the cold condition and a voltage reversal occurs at individual cells. According to the invention, a protection device is formed of elements that are connected in parallel with the cells. The elements have a high resistance at the operating temperature of the battery and a low resistance in the cold condition. The elements form a voltage divider in the case of a short circuit caused at external terminals of a cold battery. The voltage divider ensures the desired voltage division.