Method for controlling at least one operating parameter that influences the aging state of an electrical energy store in an open-loop or closed-loop manner

• US 9,184,475 B2
• Filed: 03/21/2012
• Issued: 11/10/2015
• Est. Priority Date: 09/23/2009
• Status: Active Grant

• Current Assignee: Bayerische Motoren Werke AG
• Original Assignee: Bayerische Motoren Werke AG
• Inventors: Mumelter, Georg, Jonasch, Felix, Hofmeier, Harald, Boeckl, Michael, Rogge, Simon
• Primary Examiner(s): Tso, Edward
• Assistant Examiner(s): BOATENG, ALEXIS ASIEDUA
• Application Number:
  US13/426,252
• Publication Number:
  US 20120176096A1
• Time in Patent Office: 1,329 Days
• Field of Search: 320/132, 320/134, 320/144, 320/153, 320/150, 324/430, 324/427, 324/431
• US Class Current: 1/1
• CPC Class Codes: B60L 2240/545 Temperature
• CPC Class Codes: B60L 3/12 Recording operating variables ; Monitoring of operating variables
• CPC Class Codes: B60L 58/13 Maintaining the SoC within a determined range
• 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: B60L 58/24 for controlling the temperature of batteries
• CPC Class Codes: G01R 31/374 with means for correcting the measurement for temperature or ageing
• CPC Class Codes: G01R 31/389 Measuring internal impedance, internal conductance or related variables
• CPC Class Codes: G01R 31/392 Determining battery ageing or deterioration, e.g. state of health
• CPC Class Codes: H01M 10/42 Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells H01M10/60 takes precedence
• CPC Class Codes: H01M 10/4207 for several batteries or cells simultaneously or sequentially
• CPC Class Codes: H01M 10/48 Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569
• CPC Class Codes: H02J 7/00036 Charger exchanging data with battery
• CPC Class Codes: H02J 7/00041 in response to measured battery parameters, e.g. voltage, current or temperature profile
• CPC Class Codes: H02J 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• CPC Class Codes: H02J 7/0029 with safety or protection devices or circuits
• CPC Class Codes: H02J 7/0048 Detection of remaining charge capacity or state of charge [SOC]
• CPC Class Codes: H02J 7/005 Detection of state of health [SOH]
• CPC Class Codes: H02J 7/0069 Charging or discharging for charge maintenance, battery initiation or rejuvenation
• CPC Class Codes: H02J 7/007 Regulation of charging or discharging current or voltage
• CPC Class Codes: H02J 7/04 Regulation of charging current or voltage
• CPC Class Codes: Y02E 60/10 : Energy storage using batteries
• CPC Class Codes: Y02T 10/70 : Energy storage systems for electromobility, e.g. batteries

Abstract

A method is provided for the open-loop or closed-loop control of at least one operating parameter of an electric energy accumulator influencing the aging state of the electric energy accumulator. The method determines the actual aging state of the electric energy accumulator, compares the actual aging state with a target aging state predefined for the momentary age of the energy accumulator, and restricts an operating parameter range permitted for the at least one operating parameter if the actual aging state is worse than the target aging state.

Claims

1. A method for open-loop or closed-loop control of at least one operating parameter of an electric energy accumulator that influences an aging state of the electric energy accumulator, the method comprising the acts of:

determining an actual aging stage of the electric energy accumulator, wherein the electric energy accumulator has a predefined target service life;

comparing the determined actual aging stage with a target aging state, the target aging state being predefined, as a function of the predefined target service life, for a momentary age of the electric energy accumulator; and

restricting an operating parameter range permitted for the at least one operating parameter if the actual aging state is worse than the target aging state.

2. The method according to claim 1, wherein the act of determining the actual aging state further comprises the act of determining the actual aging state of the electric energy accumulator as a function of an internal resistance of the electric energy accumulator.

3. The method according to claim 2, further comprising the act of measuring the internal resistance of the electric energy accumulator.

4. The method according to claim 1, wherein the act of determining the actual aging state of the electric energy accumulator further comprises the act of determining the actual aging state as a function of an actual capacity of the electric energy accumulator.

5. The method according to claim 2, wherein the act of determining the actual aging state of the electric energy accumulator further comprises the act of determining the actual aging state as a function of an actual capacity of the electric energy accumulator.

6. The method according to claim 4, wherein the actual aging state of the electric energy accumulator is determined as a function of an internal resistance and the actual capacity of the electric energy accumulator.

7. The method according to claim 5, wherein the actual aging state of the electric energy accumulator is determined as a function of the internal resistance and the actual capacity of the electric energy accumulator.

8. The method according to claim 1, wherein the at least one operating parameter is a charging condition of the electric energy accumulator, wherein the restricting act restricts a permissible charging condition range with respect to a momentarily still permissible charging condition range if the actual aging state is worse than the target aging state.

9. The method according to claim 7, wherein the at least one operating parameter is a charging condition of the electric energy accumulator, wherein the restricting act restricts a permissible charging condition range with respect to a momentarily still permissible charging condition range if the actual aging state is worse than the target aging state.

10. The method according to claim 1, wherein the at least one operating parameter is at least one of a charging and discharging power of the electric energy accumulator, the restricting act restricting a range of permissible charging or discharging powers with respect to a momentarily still permissible range if the actual aging state is worse than the target aging state.

11. The method according to claim 7, wherein the at least one operating parameter is at least one of a charging and discharging power of the electric energy accumulator, the restricting act restricting a range of permissible charging or discharging powers with respect to a momentarily still permissible range if the actual aging state is worse than the target aging state.

12. The method according to claim 1, wherein the at least one operating parameter is an energy accumulator temperature, the restricting act restricting a permissible energy accumulator temperature range with respect to a momentarily still permissible energy accumulator temperature range if the actual aging state is worse than the target aging state.

13. The method according to claim 7, wherein the at least one operating parameter is an energy accumulator temperature, the restricting act restricting a permissible energy accumulator temperature range with respect to a momentarily still permissible energy accumulator temperature range if the actual aging state is worse than the target aging state.