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:
Dec. 08, 2009
Filed:
Mar. 10, 2006
Gunnar Gangstoe, Trondheim, NO;
Hideyuki Sato, Chiba, JP;
Arne Aas, Trondheim, NO;
Terje Saether, Trondheim, NO;
Gunnar Gangstoe, Trondheim, NO;
Hideyuki Sato, Chiba, JP;
Arne Aas, Trondheim, NO;
Terje Saether, Trondheim, NO;
Atmel Corporation, San Jose, CA (US);
Sony Corporation, Tokyo, JP;
Abstract
A battery pack can include one or more battery cells, current blocking transistors and a battery management system. The disclosed implementations handle over-currents drawn from the battery cells that cause unstable operation of the battery management system. The over-currents are handled without causing an undesired drop in voltage output from the battery cells. The disclosed implementations can handle over-currents even if the over-currents cause the battery management system supply voltage to drop below a minimum operating voltage level for a certain period of time. The disclosed implementations use current blocking transistors that can be configured to block current flow and ensure safe operation of the battery cells in cases where the current drawn from the battery cells would be sufficiently high for a sufficiently long period of time to cause damage to the battery cells.