Method for Determining a Maximum Available Constant Current of a Battery, Arrangement for Carrying Out said Method, Battery Combined with said Type of Arrangement and Motor Vehicle Comprising said Type of Battery

• US 20150094971A1
• Filed: 02/06/2013
• Published: 04/02/2015
• Est. Priority Date: 03/28/2012
• Status: Abandoned Application

• Current Assignee: Robert Bosch GmbH, Samsung SDI Company Limited
• Original Assignee: Robert Bosch GmbH, Samsung SDI Company Limited
• Inventors: Boehm, Andre, Heubner, Anne, Wickert, Stefan, Rueger, Michael
• Application Number:
  US14/388,798
• Publication Number:
  US 20150094971A1
• Time in Patent Office: Days
• US Class Current: 702/63
• CPC Class Codes: G01R 31/3647 for determining the ability of a battery to perform a critical function, e.g. cranking
• CPC Class Codes: G01R 31/3648 comprising digital calculation means, e.g. for performing an algorithm
• CPC Class Codes: G01R 31/367 Software therefor, e.g. for battery testing using modelling or look-up tables

Abstract

A method for determining a maximum available first constant current of a battery over a first prediction period includes determining a maximum available second constant current for a second prediction period. The second prediction period occurs after the first prediction period. The method can further include limiting a first difference between the maximum available first constant current and the maximum available second constant current to one of less than or equal to a prescribed absolute value. The method can further include determining a maximum available first constant power of the battery over the first prediction period.

Claims

1. A method for determining a maximum available first constant current of a battery over a first prediction period, the method comprising:

during the determining of the maximum available first constant current, determining a maximum available second constant current for a second prediction period, wherein the second prediction period occurs after the first prediction period.

2. The method as claimed in claim 1, further comprising:

limiting a first difference between the maximum available first constant current and the maximum available second constant current to a first value less than or equal to a first prescribed absolute value.

3. The method as claimed in claim 1, further comprising:

determining a maximum available first constant power of the battery over the first prediction period includes;

determining the maximum available first constant current of the battery over the first prediction period;

determining an average voltage by averaging a voltage profile, corresponding to the maximum available first constant current, over the first prediction period; and

determining the maximum available first constant power of the battery based at least in part on the maximum available first constant current and the average voltage.

4. The method as claimed in claim 3, wherein the determining of the maximum available first constant current further comprises:

limiting a second difference between the first constant power resulting from the maximum available first constant current and a second constant power resulting from the maximum available second constant current to a second value than or equal to a second prescribed absolute value.

5. The method as claimed in claim 1, n wherein the determining of the maximum available first constant current, is based at least in part on measuring at least one of tolerances and inertias of power electronics.

6. The method as claimed in claim 2, wherein the first prescribed absolute value for the limiting of the first difference based at least in part on a charge status of the battery.

7. The method as claimed in claim 1, in wherein the determining of the maximum available first constant current is based at least in part on an equivalent circuit diagram model.

8. A system comprising:

at least one of a chip and a processor;

a module executed by the at least one of the chip and the processor and configured to determine a maximum available first constant current of a battery over a first prediction period by determining a maximum available second constant current for a second prediction period during the determination of the maximum available first constant current, wherein the second prediction period occurs after the first prediction period.

9. A battery, comprising:

a module configured to determine a maximum available first constant current of the battery over a first prediction period by determining a maximum available second constant current for a second prediction period during the determination of the maximum available first constant current, wherein the second prediction period occurs after the first prediction period.

10. The battery of claim 9, wherein the battery is comprised by a motor vehicle and the motor vehicle further comprises:

an electric drive motor for driving the motor vehicle, wherein the battery is connected to the electric drive motor.