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:
Aug. 09, 2022
Filed:
Nov. 25, 2019
Bayerische Motoren Werke Aktiengesellschaft, Munich, DE;
Tobias Hollweg, Shenyang, CN;
Johannes Kurtz, Rott am Inn, DE;
Bayerische Motoren Werke Aktiengesellschaft, Munich, DE;
Abstract
A device balances an energy storage module having multiple energy storage cells connected in series. The device includes: an interface for communication with a monitoring electronics system of the energy storage module; a charge determining device for determining a relative electrical charge quantity based on respective cell voltages and a respective resting voltage characteristic curve for each energy storage cell; a balancing requirement calculation unit for determining a respective relative balancing requirement by forming a difference between the relative electrical charge quantity of a respective energy storage cell and the relative electrical charge quantity of the energy storage cell for which the lowest relative electrical charge quantity was determined, for every energy storage cell with the exception of the energy storage cell for which the lowest relative electrical charge quantity was determined, and for determining an absolute balancing requirement for each energy storage cell; a discharging circuit which is configured to be connected to the energy storage module in such a way that a respective energy storage cell can be separately discharged by the discharging circuit; and a control device that can control the discharging circuit in such a way that the respective determined absolute balancing requirement can be removed from the respective energy storage cells.