Method for predicting the residual service life of an electric energy accumulator

• US 20060250137A1
• Filed: 06/19/2004
• Published: 11/09/2006
• Est. Priority Date: 06/25/2003
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Frey, Bernd, Schoch, Eberhard
• Granted Patent: US 7,741,849 B2
• Time in Patent Office: Days
• US Class Current: 324/426
• CPC Class Codes: B60L 2240/545 Temperature
• CPC Class Codes: B60L 2250/10 by alarm
• CPC Class Codes: B60L 58/12 responding to state of charge [SoC]
• CPC Class Codes: B60L 58/16 responding to battery ageing, e.g. to the number of charging cycles or the state of health [SoH]
• CPC Class Codes: G01R 31/367 Software therefor, e.g. for battery testing using modelling or look-up tables
• CPC Class Codes: G01R 31/392 Determining battery ageing or deterioration, e.g. state of health
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

Methods for predicting a remaining lifetime of an electric energy storage mechanism, in particular a battery in a motor vehicle and devices for implementing such methods are described in which the remaining lifetime is determined by extrapolation with the help of a mathematical model of the energy storage mechanism. This remaining lifetime is defined as the time until reaching any definable limiting values for the minimum efficiency or minimum storage capacity. The remaining lifetime is indicated and, when the level falls below a preselectable threshold, a warning is displayed. The parameters of the energy storage mechanism are adapted continuously to the real values over the lifetime. The anticipated remaining lifetime is determined by extrapolation from the values for the efficiency and/or storage capacity, based on a specifiable charge state and temperature and the minimum values required for the particular application, these values being calculated at regular intervals on the basis of the model and saved.

Claims

1-6. -6. (canceled)

7. A method for predicting a remaining lifetime of an electric energy storage mechanism, comprising:

determining the remaining lifetime by extrapolation via a mathematical model of the energy storage mechanism;

defining the remaining lifetime as a time until reaching any definable limiting values for one of a minimum efficiency and a minimum storage capacity;

indicating the remaining lifetime; and

when a level falls below a preselectable threshold for the remaining lifetime, providing a warning.

13. The method as recited in claim 7, wherein the electric energy storage mechanism includes a battery in a motor vehicle.

12. A device for predicting a remaining lifetime of an electric energy storage mechanism, comprising:

a display;

a memory; and

a processor, wherien the processor is programmed to perform the following;

determining the remaining lifetime by extrapolation via a mathematical model of the energy storage mechanism,

defining the remaining lifetime as a time until reaching any definable limiting values for one of a minimum efficiency and a minimum storage capacity,

indicating the remaining lifetime, and

when a level falls below a preselectable threshold for the remaining lifetime, providing a warning.