Method for Determining and/or Predicting the High Current Carrying Capacity of a Battery

• US 20120253777A1
• Filed: 04/13/2012
• Published: 10/04/2012
• Est. Priority Date: 10/14/2009
• Status: Abandoned Application

• Current Assignee: Bayerische Motoren Werke AG
• Original Assignee: Bayerische Motoren Werke AG
• Inventors: ROSCHER, Michael
• Application Number:
  US13/446,529
• Publication Number:
  US 20120253777A1
• Time in Patent Office: Days
• US Class Current: 703/18
• 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 31/367 Software therefor, e.g. for battery testing using modelling or look-up tables
• CPC Class Codes: G01R 31/389 Measuring internal impedance, internal conductance or related variables
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

A method is provided for determining and/or predicting the high current carrying capacity of a battery, wherein the parameters of a model of the battery impedance are used as a basis, and from which the high current carrying capacity of the battery is determined. Different parameters are used as the basis for the charging and discharging processes.

Claims

1. A method for at least one of determining and predicting a high current carrying capacity of a battery, the method comprising the acts of:

basing the determining and/or predicting of the high current carrying capacity of the battery upon parameters of a model of an impedance of the battery; and

using different parameters as a basis for charging and discharging processes.

2. The method according to claim 1, wherein different characteristic lines are assigned to the parameters of the model of the battery impedance for the charging and the discharging processes.

3. The method according to claim 1, further comprising the acts of:

assigning three parameter ranges for an entire current intensity range; and

wherein the three parameter ranges are assigned to the charging process, a neutral state, and the discharging process.

4. The method according to claim 2, further comprising the acts of:

assigning three parameter ranges for an entire current intensity range; and

wherein the three parameter ranges are assigned to the charging process, a neutral state, and the discharging process.

5. The method according to claim 1, further comprising the acts of:

assigning more than three parameter ranges for an entire current intensity range; and

wherein boundaries of the more than three parameter ranges are defined by values of a respective current intensity.

6. The method according to claim 2, further comprising the acts of:

assigning more than three parameter ranges for an entire current intensity range; and

wherein boundaries of the more than three parameter ranges are defined by values of a respective current intensity.

7. The method according to claim 3, wherein the three parameter ranges overlap.

8. The method according to claim 4, wherein the three parameter ranges overlap.

9. The method according to claim 5, wherein the more than three parameter ranges overlap.

10. The method according to claim 6, wherein the more than three parameter ranges overlap.

11. The method according to claim 3, wherein the three parameter ranges do not overlap.

12. The method according to claim 4, wherein the three parameter ranges do not overlap.

13. The method according to claim 5, wherein the more than three parameter ranges do not overlap.

14. The method according to claim 6, wherein the more than three parameter ranges do not overlap.