Patent · US Active

Method for reducing the total charge loss of batteries

US9362758B2 · kind B2 · utility

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0References

11Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Jens Becker · Ludwigshafen am Rhein, DE
Andre Boehm · Yongin-si, KR
Armin Steck · Renningen, DE
Christian Korn · Mannheim, DE
Marianne Heizmann · Markgröningen, DE

Key dates

Filing date	Mar 18, 2014
Grant date	Jun 7, 2016
Priority date	—
Expiry date	Aug 22, 2034

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/70
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method for reducing a total loss of charge of battery cells by balancing states of charge includes checking boundary conditions as to whether a vehicle is in the park mode, whether a previous balancing step occurred in the past by at least a defined time period, whether a temperature of a balancing unit lies below an adjustable temperature limit and whether states of charge of all battery cells exceed a minimum state of charge. Additionally, the method includes determining a need for balancing such that a check is made as to whether a maximum difference of all states of charge of all battery cells is greater than an adjustable limit state of charge. Also the method includes, balancing by the balancing units if the first two steps of the method are affirmed. The balancing resistances are connected to respective battery cells for a predetermined time.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.